Proto-Siouan language

Proto-Siouan
Reconstruction of	Western Siouan languages
Region	Ohio River Valley
Era	c. 2000 BC

Proto-Siouan (/ˌproʊtoʊ ˈsuː.ən/ PROH-toh SOO-ən) is the reconstructed ancestor of the Western Siouan languages, also called Siouan proper. Although the attested daughter languages are largely native to the Great Plains region of the United States and Canada, Proto-Siouan is believed to have been originally spoken in and around the Ohio River Valley around 2000 BC, when it split off from Eastern Siouan languages, also called the Catawban languages. Although Siouan-speaking peoples were eventually displaced or assimilated after losing several wars of conquest against their northern Iroquois neighbors during the 17th century, their presence in and around Appalachia is supported by toponymic and onomastic data.

Proto-Siouan phonology had five oral and three nasal vowels, each with long and short variants, and a complex set of consonants including a four-way stop distinction. The language also distinguished at least two tones, high and non-high, though a falling tone may have also been present. Grammatically, Proto-Siouan was head-marking with simple agglutination, had an active–stative morphosyntactic alignment, and demonstrated subject–object–verb word order. The language used sound symbolism, phonesthemes, and apophony as ways of conveying meaning, sometimes in combination.

Beginning in the first half of the 19th century, linguists have attempted to develop a broader understanding of the Siouan languages' relationships to other indigenous languages of the Americas. Early successes linked the larger Western Siouan family to the Catawban family, composed of two poorly attested languages, Catawba and Woccon. There has been some acceptance of linking the Siouan–Catawban family to the Yuchi language indigenous to eastern Tennessee, though it may be more closely related to the Catawban group than to Siouan proper. Wider attempts to link the language family variously to the Iroquoian, Caddoan, and Muskogean languages, as well as a number of other language isolates, are not widely accepted.

History

The Proto-Siouan language is the reconstructed ancestor of the Western Siouan languages. The language family was first identified as an interrelated group in 1836 by Albert Gallatin, a Genevan-American ethnologist, who named it after its most widely recognized ethnolinguistic group, the Sioux. In 1881, the Swiss-American scholar Albert Gatschet documented the Catawba language of South Carolina and commented on its similarity to the Siouan languages of the Great Plains of North America. Two years later, Horatio Hale similarly linked the Tutelo language of Virginia to other Great Plains Siouan languages in his 1883 description of the tribe. In 1836, Gallatin built on the work of Johann Adelung and Johann Vater, describing the Siouan and Catawban languages as sister branches of one family. Work published by Frank Siebert in 1945 is considered to have definitively proven the relationship.

In 1984, several Siouanists led by David S. Rood began compiling a comparative dictionary after receiving funding form the National Endowment for the Humanities and National Science Foundation. Though advanced copies were being distributed in 1997 and again in 2006, the project broke down following the "retirement, disappearance, or focus shift" of most of the staff after the unexpected death of Robert L. Rankin, its most comprehensive contributor, in February 2014. The dictionary was published in May 2015 with its original commentary.

Although historians have identified at least twenty-five Siouan-speaking ethnic groups, dialectal differences and, in some cases, scant attestations make determining the precise number of Siouan languages difficult. David Rood and John E. Koontz estimate that there are between fifteen and eighteen attested Siouan languages. Rankin puts the number at simply "more than fifteen".

Origins

Dating

Proto-Siouan's parent language, Proto-Siouan–Catawban, was probably spoken around 3000 BC, splitting off into the Eastern Siouan and Western Siouan languages around a thousand years later. Earlier efforts to date the language differed drastically, from the end of the Pleistocene around 9700 BC to around 800 AD, but archeological records and research into shared vocabulary have yielded a narrower estimate of around five thousand years ago. Glottochronological dating of the Eastern–Western split similarly yielded mixed results, though modern linguistics no longer regards this method as scientifically sound. Rankin argued that this split should be dated to roughly 2000 BC.

Archeological evidence may also help in dating Proto-Siouan. The gourd species Cucurbita pepo, for example, has been used as one basis for this estimate; cucurbits begin to appear in the archeological records between around 3400 BC to around 2300 BC. The Siouan languages share a commonly derived term for the plant across great geographic and phylogenetic distances, such as in the case of the Mandan language, formerly spoken in North Dakota, and the Biloxi language, formerly spoken in Mississippi and Louisiana. The Proto-Siouan term for these cucurbits has been reconstructed as *hkó•re or *ahkó•re and its descendants include Crow kakúwi ('squash, pumpkin'), Mandan kóore ('squash'), Biloxi aḳodí ('gourd, gourd cup'), and Osage 𐓥𐓪𐓥𐓪́𐓨𐓘 (hkohkó ma; 'cucumber'). However, by the time these gourds were domesticated as a food source around 1000 BC, evidence suggests that the family had already split into its four main branches: Missouri River Siouan, Mississippi Valley Siouan, Ohio Valley Siouan, and Mandan, with the Mississippi Valley languages already showing signs of further division.

Several other terms for plants have helped linguists frame and reconstruct lower phylogenetic relationships within the Western Siouan family. For example, the languages do not share a common term for corn; thus, the first divisions of Proto-Siouan precede corn's introduction from Mesoamerica around 200 AD. Terms related to the agricultural production of corn are pervasive in the Siouan languages, which allows for much more stable estimates for timing since, while one word may fall out of use in any language at any point during its history, a cluster of related words is less likely to all be replaced. The terms for corn are fairly disparate. For example, the Mandan term kóoxą'te (lit. 'gourd grass') was borrowed into Hidatsa (kóoxaati) and Crow (xóoxaashi) after the Mandan probably introduced either the plant itself or techniques related to its cultivation; Ofo and Biloxi borrowed their term from a Caddoan language, while the other languages typically adapted a dated term for squash.

Urheimat

Although the modern Siouan languages are mostly spoken in the Great Plains, scholars believe that Proto-Siouan originated in the Ohio River Valley. Earlier scholarship, namely the work of the American archeologist James Bennett Griffin in the mid-20th century, argued that the Siouan languages were originally spoken somewhere in the Allegheny Piedmont in modern-day Virginia and North Carolina. Siouan-speaking peoples had a wide area of influence in the eastern regions of the modern-day United States. Horatio Hale, for example, noticed that several toponyms in the Appalachian region appeared to be of Siouan origin, especially between Virginia and North Carolina. Other onomastic data has helped to confirm this view. The oral history of modern Siouan-speaking peoples also provides some support; John R. Swanton gathered a number of accounts from speakers which indicated a homeland east of the Ohio River, and the Hidatsa people indicated similar origins in accounts given to Washington Matthews. A Kaw chieftain recounted to James Owen Dorsey that his people originated in modern-day New York abutting the Atlantic, which they called the "Great Water".

The westward migration began as a result of several wars of conquest over hunting grounds by the Iroquois pushing southward from their own Urheimat in the Finger Lakes region of Western and Central New York. Successive Iroquois victories caused a massive displacement of Siouan-speaking populations, probably occurring during the 1600s following an increase in European colonization efforts on the American Eastern Seaboard and the start of the Beaver Wars. However, the push was neither instantaneous nor universal; the Lakota are attested near modern-day Chicago in 1648, with estimates of their migration over the Mississippi River placed sometime around the turn of the 18th century. Other Siouan-speaking peoples, however, were adopted by the Iroquois; the Tutelo people, for example, were formally adopted in 1753, settling around Cayuga Lake, one of the Finger Lakes, in 1771. They remained with the Cayuga people during their subsequent migration to Canada following the American Revolution.

The displaced tribes' migration from the original Urheimat obfuscated the relationship of some of the languages, with some such as Biloxi and Ofo being pushed into, and influenced by, the Lower Mississippi Valley sprachbund, or linguistic area. The Ofo language, spoken in modern-day Ohio before being forced out by the Iroquois, was thought for many years to be a member of the Muskogean languages of the Deep South, in part because it contained the phoneme /f/, which is absent from all other Siouan languages. In 1908, Swanton met an Ofo speaker, Rosa Pierrette, living among the Tunica people in Marksville, Louisiana. His work linked the language to the Dakota language in the Great Plains. Similarly, Gatschet's published work on Biloxi, then spoken in the Gulf Coast regions of modern-day Mississippi and Louisiana, placed it within the Siouan family; his work was later supported by Dorsey's ethnographic work on the tribe in 1893.

Phonology

Vowels

Proto-Siouan's vowel system had five oral vowels and three nasal vowels, each of which had contrastive vowel length. The vowels reconstructed for Proto-Siouan are as follows:

	Front		Central		Back
	Oral	Nasal	Oral	Nasal	Oral	Nasal
Close	*i *i•	*į *į•			*u *u•	*ų *ų•
Mid	*e *e•				*o *o•
Open			*a *a•	*ą *ą•

It is possible that an earlier form of the language, known as "pre-Proto-Siouan", had nasalized forms of *e and *o, but these may have been lost as the result of a merger with the oral forms. Because most Siouan languages contrast vowel length, vowels in Proto-Siouan have been reconstructed as having both long and short forms. However, understanding vowel length in the family's extinct members has proven difficult, as earlier fieldwork with Siouan languages did not typically discuss vowel length at all. Length in Proto-Siouan was probably somewhat predictable and may have affected tone in the daughter languages. When short vowels occurred in pretonic syllables, they were often deleted if the onset was a sonorant; this process remained productive in several descendant languages as well. All examples of nasal consonants in modern Siouan languages are explainable through series of sonorants followed by nasal vowels; for example, when *w is followed by a nasal vowel, it may become [m].

Consonants

The consonants have been reconstructed as follows:

		Labial	Alveolar	Palatal	Velar	Glottal
Stop	plain	*p	*t		*k	*ʔ
	preaspirated	*hp	*ht		*hk
	aspirated	*ph	*th		*kh
	glottalized	*pʔ	*tʔ		*kʔ
Fricative	plain		*s	*š	*x	*h
	glottalized		*sʔ	*šʔ	*xʔ
Sonorant	plain	*w	*r	*y
	"funny"	*W	*R

The language contained two consonants known as "funny w" and "funny r", written as *W and *R, respectively. While these consonants are thought to have been similar to *w and *r, their reflexes in attested Siouan languages are distinct; while the outcomes of *w and *r remained sonorant in the descendant languages, *W and *R typically develop into obstruents or sonorant–stop clusters. Evidence suggests that *W may have been the result of a geminated *w, typically crossing a morpheme boundary, or more rarely when *w is abutting a laryngeal consonant. The origin of the *R phoneme is less clear, though it may represent *r clustering with a laryngeal or some other consonant; *r tends towards similar reflexes when in clusters such as *wr, *sr, and *šr. Similarly, Mandan evidence supports that a rhotic–glottal stop cluster may have led to *R. Linguists have attempted to remove these phonemes from the inventory, though none have been successful. More recently, scholars such as Juliette Blevins have argued that "funny w" and "funny r" may be better represented as voiced stops [b] and [d], respectively.

Carter's law

"Carter's law" redirects here; not to be confused with Jack Carter's Law.

Proto-Siouan has also been reconstructed with preaspirated stops. Several Siouan languages either retain a preaspirated series or have a distinct set of reflexes; in either case, this set is treated as a single unit in syllabification and segmentation. The preaspirated series was not originally contrastive in pre-Proto-Siouan, but rather the result of a regular phonological process whereby plain voiceless stops were preaspirated whenever the following vowel was stressed. This process has been termed Carter's law, after Richard T. Carter, who first described the phenomenon in his work on Ofo. This change, however, was later phonemicized and several sets of cognates attest the set as distinct phonemes.

Although this series is considered to have been phonemic, several languages – including Hidatsa, Crow, and Mandan – later lost this series. In Ofo, Ho-Chunk, the Dakotan languages, and the Chiwere dialects, the preaspiration became postaspiration, though these changes occurred independently and do not express a family-internal phylogenetic relationship. In the Dhegihan languages, preaspirated consonants either remained preaspirated or changed into plain geminates.

Because the development of the stop series is so transparent, the consonant inventory is sometimes presented in a minimalist fashion, which removes the complex stop series and glottalized forms. Rankin, Carter, and A. Wesley Jones suggest that a pre-Proto-Siouan consonant inventory without this phonological conditioning may have existed at an earlier date. This minimalist inventory is also a closer match to that of the Catawba language. The minimalist form is as follows:

	Labial	Alveolar	Palatal	Velar	Glottal
Stop	**p	**t		**k	**ʔ
Fricative		**s	**ʃ	**x	**h
Sonorant	**w	**r	**j

Tone and prosody

Stress was typically placed on the second syllable of a Proto-Siouan word. The stressed vowel was typically long, though this is not universal. The language's maximal syllable structure was probably CCV, though syllable-initial clusters are typically bimorphemic and roots routinely consist of a single CV structure. Examples of single-morpheme CCV roots include *kšą ('bend'); its descendants include Dakota kšą́ ('crooked'), Biloxi ktcaⁿ ('next to, next one'), and Osage 𐓬𐓘𐓯𐓪́͘ (bashóⁿ; 'crooked, river bend'). Onset clusters in descendant Siouan languages often derive from later sound changes. In Mandan and Lakota, for example, the Proto-Siouan prefixes *wa-, marking inanimate absolutives and indefinite third-person objects, and *wi-, marking animals, often collapsed into a single-phoneme prefix independently in both languages, leading to a CCV syllable cluster with its stem. Examples include Proto-Siouan *wišį́:ka ('flying squirrel') becoming Lakota pšįčá. Other CCV roots are often the result of phonesthemic forms, a kind of sound symbolism used for groups of sounds or sound-producing motions. Some reconstructed CVC syllables have been identified, but they are incredibly rare and several are semantically obscure. Examples include *-puS- ('vermin insect'), where the capital S is a sound symbolic fricative gradation; examples of descendants include Osage 𐓻𐓘́𐓬𐓶𐓯𐓤𐓘 (zhábiuçka, 'ant'), Hidatsa waapúkša ('insect, snake') and Crow baapúxta ('insect').

Proto-Siouan had at least two contrastive tones: high, which is marked with an acute accent (◌́) on the vowel, and non-high, which is unmarked. It is possible that the language also had a falling tone, marked with a circumflex (◌̂). Although the existence of a falling tone is common both areally and typologically, Proto-Siouan is not typically reconstructed as having a falling tone. It is possible that the falling tone existed at an earlier point, perhaps in pre-Proto-Siouan, and the tone's interaction with plain stops resulted in the glottalized stop series. In several daughter languages, if the stressed syllable had a falling tone, it lost this tone and became glottalized. Examples of this process include the reconstructed form *kû ('give'). In Proto-Siouan, this falling tone shifted to *kuʔ in Proto–Missouri Valley Siouan and Proto-Mandan, exhibiting a non-high tone with an excrescent word-final glottal stop. In modern Crow, the glottal stop was vocalized, leading to kúu with both a long vowel and high tone; modern Mandan and Hidatsa maintained the syllable-final stop. These processes may be represented thus:

Stage I	*kû
Stage II	*kuʔ
Stage III	kúu	kuʔ	*ʔku
	Modern Crow	Modern Hidatsa/Modern Mandan	Proto–Ohio Valley

In the Mississippi Valley Siouan languages – including Chiwere–Ho-Chunk, the Dhegihan languages, and the Dakota languages – these excrescent glottal stops metathesized with the vowel and continued as a class of glottalized stops. In Ohio Valley Siouan, the stop appears to have metathesized to the onset, leading to unique outcomes in the daughter languages there including an initial prothetic vowel, as in Ofo, or prenasalized consonants in onset, as in Tutelo. An alternative reconstruction of this etymon considers the original Proto-Siouan term to have been *kʔu, with a glottalized initial stop.

Ablaut

All attested Siouan languages express a final-vowel root alternation known as ablaut, which is reconstructable to Proto-Siouan. Typically, this alternation is between -a and -e, though some languages also include a word-final -i or -į. There is no clear phonological condition under which this ablaut occurs. Possibilities include that they may be determined by suffixes, postclitics, the following words, or potentially nothing at all in phrase-final conditions. The ablaut can be seen in examples from Lakota, where káğe ('s/he made it'), káğa he? ('did s/he make it?'), and káğiŋ kte ('s/he will make it') show the tripartite division, all derived from an ablauting root – káğA ('to make something') – where the capital A signifies the alternating vowel.

Sound symbolism

The Siouan languages exhibit what is called fricative-graded sound symbolism, sometimes termed spirant gradation, a pervasive kind of sound symbolism where fricative consonants change pronunciation to indicate a change in meaning. The pervasiveness of this symbolic use of language makes reconstruction back to Proto-Siouan possible. This sound symbolism is used to express gradation in intensity, volume, roughness, and other similar concepts. In Lakota, for example, the root set meaning 'crack' has several forms based on the intensity of the damage: -suzA- for a single crack, -šužA- for a few cracks or a bad bruising, and -ȟuǧA- for fractured or crushed.

Proto-Siouan also contained a series of phonesthemic root-initial clusters used to describe certain kinds of sounds or sound-producing motions. Like the spirant gradation previously described, these roots often differ through the realization of the vowel, of spirant gradation, or as a result of both. Examples include series symbolizing ripping – *sré- ('split'), *šré- ('split, shred'), and *xré- ('rip, tear') – and series symbolizing slippery motions or actions – *srą́- ('dribble'), *srí- ('ooze out, slurp, lick'), *srú- ('slide, masturbate'). These series are sometimes reconstructed with an *l instead of an *r and are similar to the English-language sl- equivalents, such as slime, sludge, slick, and slobber.

Grammar

Given the widespread use of object–verb syntax among the Siouan languages, Proto-Siouan had a constituent word order of subject–object–verb. Adverbs were able to appear on either side of the verb. It was head-marking and adjectives followed their head nouns. The language appears to have been more analytic than its modern descendants. Proto-Siouan was a somewhat agglutinative language with a tendency towards simple incorporation, though its output is more in line with basic compounding. Its morphosyntactic alignment was active–stative. Eventually, each of the Ohio Valley Siouan languages independently lost active–stative agreement, but they are unique in this way among Siouan languages. Although some descendants exhibit clusivity distinctions and an involuntary desiderative, both of which occur in Hidatsa and Crow, these are not reconstructable in Proto-Siouan.

Verbs in Proto-Siouan were inflected for person, number, aspect, mode, tense, instrument, and likely other markers. Attested Siouan languages mark variously for grammatical gender, evidentiality, and quotativity, though it is unclear which of these were present in Proto-Siouan, if any. At least three locative markers – *a- ('on, at'), *o- ('in'), and *i- ('toward') – as well as the general instrumental prefix *í-, were probably proclitics and not true affixes in Proto-Siouan, or even pre-Proto-Siouan, as they are in the daughter languages, as evidence indicates that they had stressed long vowels. The language's first- and second-person agent markers – *w(a)- and *y(a)-, respectively – similarly do not undergo expected changes in stress so they are also believed to have been proclitics. The only reconstructable elements of the verbal template are the root, first- and second-person agent markers, and dative-possessive markers.

Proto-Siouan also had a tripartite system for verbs of motion. This system maps the departure, progression, and arrival of an agent against a deictic center, a "home base", and an apogee – that is, when the agent begins the return to their home base. The home base is described as a "location to which the traveler belongs", which may have a long duration like a home or workplace or a shorter one such as a meeting or social gathering. The system has been reconstructed in Proto-Siouan as follows, where the capital E represents an ablauting vowel:

		Departure	Progression	Arrival
Away from deictic center	Away from base	*hi•rÉ• ('leave here to go there')	*rÉ• ('go there')	*hí• ('arrive there')
	Toward base	*ki•krÉ• ('leave here to go back there')	*krÉ• ('go back there')	*kí• ('arrive back there')
Toward deictic center	Away from base	*rhi•hú• ('leave there to go here')	*hú• ('come here')	*rhí• ('arrive here')
	Toward base	*kri•kú• ('leave there to go back here')	*kú• ('come back here')	*krí• ('arrive back here')

Among the Siouan languages, instrumentally-prefixed verbs comprise the vast majority of active verbs. These verbs consist of a root, which is typically a bound morpheme, in combination with a prefix which expresses the manner by which the action is achieved, such as *aRá 'by heating' or *ra 'using the mouth'. In Proto-Siouan, these prefixes probably began as either proclitics or independent verbs, as they do not undergo the same phonological changes found in other prefixes. They may have also been derived from some kind of compounding or some other opaque derivational system. Because they behave differently from other affixes, they are sometimes termed "root extensions", especially since the root verb cannot usually stand on its own without them.

Proto-Siouan had a series of verbs – *rą́•ke ('sit'), *rahé ('stand', inanimate), *hą́•ke ('stand', animate), *ʔų́•ke ('lie'), and *rį́• ('move') – which are used in all descendants to mark the continuative aspect, except for the Dhegihan subfamily. In all of the attested Dhegihan languages, these aspectual functions were lost, but the terms came to be used as a kind of noun class marking. For example, in Omaha–Ponca, a singular, non-agentive animate noun was marked with ðį, as in tté-žįga ðį ('the [moving] buffalo calf'), while singular nouns – irrespective of animacy – seen as "lying down" in some sense, were marked with khe, as in waˀú khe ('the [reclining] woman') or né khe ('the lake').

See also

• Classification of the Indigenous languages of the Americas
• Dorsey's law
• List of proto-languages
• Proto-Iroquoian language

References

Sources

• Blevins, Juliette; Egurtzegi, Ander; Ullrich, Jan (2020). "Final obstruent voicing in Lakota: Phonetic evidence and phonological implications". Language. 96 (2): 294–337. doi:10.1353/lan.2020.0022. ISSN 1535-0665.
• Campbell, Lyle (1997). American Indian Languages: The Historical Linguistics of Native America. Oxford Studies in Anthropological Linguistics. Vol. 4. Oxford University Press. ISBN 978-0-19-509427-5.
• Coen, Noah Michael (2021). "(Para-)Adpositional Morphosyntax in Siouan: A Case Study of Lakhota-Dakota-Nakota, Catawba, and Crow". In Kasak, Ryan M.; Rudin, Catherine; Mirzayan, Armik; Dutta, Samiron (eds.). Proceedings of the 41st Siouan and Caddoan Languages Conference. Siouan and Caddoan Languages Conference Open access icon. Norman, Oklahoma. pp. 13–58. ISSN 2641-9904.
• Collette, Vincent; Kennedy, Wilma (2023). A Concise Dictionary of Nakoda (Assiniboine). Lincoln, Nebraska: University of Nebraska Press. ISBN 978-1-4962-3272-4.
• Mirzayan, Armik (2023). "56. Sketch of the Siouan Language Family". In Dagostino, Carmen; Mithun, Marianne; Rice, Keren (eds.). The Languages and Linguistics of Indigenous North America: A Comprehensive Guide, Volume 2. The World of Linguistics. Vol. 13.2. De Gruyter. pp. 1447–1518. doi:10.1515/9783110712742. ISBN 978-3-11-071274-2.
• Jones, A. Wesley (1990). "The Case for Root Extensions in Proto-Siouan" (PDF). In Ingemann, Frances (ed.). 1990 Mid-America Linguistics Conference Papers. Mid-America Linguistics Conference. Lawrence, Kansas: University of Kansas Department of Linguistics. pp. 505–517.
• Jordan, Kurt A. (2013). "Incorporation and Colonization: Postcolumbian Iroquois Satellite Communities and Processes of Indigenous Autonomy". American Anthropologist. 115 (1). Wiley: 29–43. doi:10.1111/j.1548-1433.2012.01533.x. ISSN 0002-7294. JSTOR 24028698.
• Kasak, Ryan M. (2013). A Reconstruction of Verbs of Motion in Proto-Siouan. Joint LSA–SSILA Winter Meeting 2013. Boston: Society for the Study of Indigenous Languages of the Americas. pp. 1–24.
• Kasak, Ryan M. (2020). Clause Structure in Proto-Siouan: From Words to Clitics to Affixes (PDF). Siouan and Caddoan Languages Conference. Crow Agency, Montana: Elmhurst College. Archived from the original (PDF) on 18 October 2025.
• Kasak, Ryan M. (2024). A Grammar of Mandan. Comprehensive Grammar Library. Vol. 10. Berlin: Language Science Press Open access icon. doi:10.5281/zenodo.14227513. ISBN 978-3-96110-495-6. ISSN 2749-7798.
• Kaufman, David V. (2018). "Biloxi Origins". Native South. 11 (1): 145–157. doi:10.1353/nso.2018.0005. ISSN 2152-4025.
• Ko, Edwin (2023). Studies in Crow Linguistics: Documentation, Grammar, and History (Doctoral thesis). University of California at Berkeley Open access icon.
• Miestamo, Matti; Bakker, Dik; Arppe, Antti (2016). "Sampling for variety". Linguistic Typology. 20 (2): 233–296. doi:10.1515/lingty-2016-0006. ISSN 1430-0532.
• Picone, Michael D.; Davies, Catherine Evans, eds. (2015). New Perspectives on Language Variety in the South: Historical and Contemporary Approaches. Tuscaloosa, Alabama: University of Alabama Press. ISBN 978-0-8173-8736-5.
  • Munro, Pamela. "2. American Indian Languages of the Southeast: An Introduction". In Picone & Davies (2015), pp. 21–42.
  • Rankin, Robert L. "4. The Ofo Language of Louisiana: Recovery of Grammar and Typology". In Picone & Davies (2015), pp. 52–71.
  • Rudes, Blair A. "6. Pre-Columbian Links to the Caribbean: Evidence Connecting Cusabo to Taíno". In Picone & Davies (2015), pp. 82–93.
• Piperno, Dolores R. (2011). "The Origins of Plant Cultivation and Domestication in the New World Tropics: Patterns, Process, and New Developments". Current Anthropology. 52 (S4): S453–S470. doi:10.1086/659998. ISSN 0011-3204.
• Rankin, Robert L. (1996). "Deeper Genetic Relationships in North America: Some Tempered Pessimism". Annual Meeting of the Berkeley Linguistics Society. 22 (2): 117–128. doi:10.3765/bls.v22i2.1362. ISSN 2377-1666.
• Rankin, Robert L.; Carter, Richard T.; Jones, A. Wesley (1998). "Proto-Siouan Phonology and Grammar" (PDF). In Li, Xingzhong; Lopez, Luis; Stroik, Tom (eds.). Papers from the 1997 Mid-America Linguistics Conference. Mid-America Linguistics Conference. Columbia, Missouri: University of Missouri. pp. 366–375.
• Rankin, Robert L. (2004). "The history and development of Siouan positional with special attention to polygrammaticalization in Dhegiha". Sprachtypologie und Universalienforschung. 57 (2–3). doi:10.1524/stuf.2004.57.23.202. ISSN 2196-7148.
• Rankin, Robert L.; Carter, Richard T.; Jones, A. Wesley; Koontz, John E.; Rood, David S.; Hartmann, Iren, eds. (2015). Comparative Siouan Dictionary. Leipzig: Max Planck Institute for Evolutionary Anthropology Open access icon. Retrieved 22 June 2025.
• Rood, David; Koontz, John E. (2002). "Chapter Eleven: The Comparative Siouan Dictionary Project" (PDF). In Frawley, William; Hill, Kenneth C.; Munro, Pamela (eds.). Making Dictionaries: Preserving Indigenous Languages of the Americas. Berkeley: University of California Press. pp. 259–281. ISBN 978-0-520-22996-9.
• Rood, David; Boyle, John, eds. (2020). Siouan Languages and Linguistics: Selected Papers by Robert L. Rankin. Brill. doi:10.1163/9789004406285. ISBN 978-90-04-40628-5.
  • Rankin, Robert L. (2002). A Diachronic Perspective on Active/Stative Alignment in Siouan. Lawrence, Kansas: University of Kansas and Research Center for Linguistic Typology. pp. 181–216.
  • Rankin, Robert L. (2003). On Siouan Chronology. Research Center for Linguistic Typology. Melbourne. pp. 262–291.
• Rudin, Catherine; Gordon, Bryan J., eds. (2016). Advances in the Study of Siouan Languages and Linguistics. Studies in Diversity Linguistics. Vol. 10. Berlin: Language Science Press Open access icon. doi:10.17169/LANGSCI.B94.118. ISBN 978-3-946234-37-1. ISSN 2363-5568.
  • Kasak, Ryan M. "Chapter 1: A distant genetic relationship between Siouan–Catawban and Yuchi". In Rudin & Gordon (2016), pp. 5–38.
  • Kaufman, David. "Chapter 2: Two Siouan languages walk into a sprachbund". In Rudin & Gordon (2016), pp. 39–62.
  • Larson, Rory. "Chapter 3: Regular sound shifts in the history of Siouan". In Rudin & Gordon (2016), pp. 63–82.
• Schillaci, Michael A.; Kopris, Craig; Wichmann, Søren; Dewar, Genevieve (2017). "Linguistic Clues to Iroquoian Prehistory". Journal of Anthropological Research. 73 (3): 448–485. doi:10.1086/693055. ISSN 0091-7710.
• Sutton, Logan (2024). "Linguistic Evidence of Contact between Northern Caddoan and Siouan Languages: Arikara-Pawnee Verbal Classifiers". In Andersson, Rani-Henrik; Veyrié, Thierry; Sutton, Logan (eds.). Great Plains Ethnohistory: New Interdisciplinary Approaches. Lincoln, Nebraska: University of Nebraska Press. pp. 315–344. ISBN 978-1-4962-4211-2.
• "𐒼𐓂𐒼𐓂𐓀𐒰". Osage Dictionary. Pawhuska, Oklahoma: Osage Nation. n.d. Retrieved 4 September 2026.

Further reading

• Chafe, Wallace L. (1976). The Caddoan, Iroquoian, and Siouan Languages. De Gruyter. doi:10.1515/9783110804669. ISBN 978-90-279-3443-7.
• Griffin, James B. (1942). "On the Historic Location of the Tutelo and the Mohetan in the Ohio Valley". American Anthropologist. 44 (2). American Anthropological Association: 275–280. doi:10.1525/aa.1942.44.2.02a00080. ISSN 0002-7294. JSTOR 663025.
• Hale, Horatio (1883). "The Tutelo Tribe and Language". Proceedings of the American Philosophical Society. 21 (114). American Philosophical Society: 1–47. ISSN 0003-049X. JSTOR 982359.
• Kasak, Ryan M., ed. (2018). Proceedings of the 38th Siouan and Caddoan Languages Conference. Siouan and Caddoan Languages Conference. Chicago: Northeastern Illinois University Linguistics Department. ISSN 2641-9904.
• Kasak, Ryan M. (2021). "Topic and Focus in Mandan". In Kasak, Ryan M.; Rudin, Catherine; Mirzayan, Armik; Dutta, Samiron (eds.). Proceedings of the 41st Siouan and Caddoan Languages Conference. Siouan and Caddoan Languages Conference. Norman, Oklahoma. pp. 59–89. ISSN 2641-9904.
• Ko, Edwin (2021). A Bayesian phylogenetic study of the Siouan language family using typological data (PDF). 41st Siouan and Caddoan Languages Conference. Norman, Oklahoma: University of Oklahoma Department of Languages, Literatures, and Linguistics.
• Linnamae, Urve; Ervin, A. M.; Walker, E. G., eds. (1983). "Siouan Syncopating *r-Stems" (PDF). Proceedings of the Second Siouan Languages Conference. Siouan Languages Conference. Vol. 13. ISSN 2641-9904.
• Matthews, G. H. (1959). "Proto-Siouan Kinship Terminology". American Anthropologist. 61 (2). American Anthropological Association: 252–278. doi:10.1525/aa.1959.61.2.02a00050. ISSN 0002-7294. JSTOR 665096.
• Matthews, G. H. (1970). "Some Notes on the Proto-Siouan Continuants". International Journal of American Linguistics. 36 (2). University of Chicago Press: 98–109. doi:10.1086/465102. ISSN 0020-7071. JSTOR 1264668.
• Rankin, Robert L. (2006) [1995]. On Mississippi Valley Siouan "Ablaut" (PDF). Siouan and Caddoan Linguistics Conference. Proceedings of the 15th Siouan and Caddoan Languages Conference. Albuquerque.
• Silver, Shirley; Miller, Wick R. (1997). American Indian Languages: Cultural and Social Contexts. Tucson: University of Arizona Press. ISBN 978-0-8165-1802-9.
• Speck, Frank G. (1938). "The Question of Matrilineal Descent in the Southeastern Siouan Area". American Anthropologist. 40 (1). [American Anthropological Association, Wiley]: 1–12. doi:10.1525/aa.1938.40.1.02a00020. ISSN 0002-7294. JSTOR 661786.
• Sturtevant, William C. (1958). "Siouan Languages in the East". American Anthropologist. 60 (4). [American Anthropological Association, Wiley]: 738–743. doi:10.1525/aa.1958.60.4.02a00120. ISSN 0002-7294. JSTOR 665680.
• Swanton, John R. (1923). "New light on the early history of the Siouan peoples". Journal of the Washington Academy of Sciences. 13 (3). Washington Academy of Sciences: 33–43. ISSN 0043-0439. JSTOR 24532662.
• Swanton, John R. (1943). "Siouan Tribes and the Ohio Valley". American Anthropologist. 45 (1). American Anthropological Association: 49–66. doi:10.1525/aa.1943.45.1.02a00050. ISSN 0002-7294. JSTOR 662865.
• Taylor, Allan R. (1976). "On Verbs of Motion in Siouan Languages". International Journal of American Linguistics. 42 (4). University of Chicago Press: 287–296. doi:10.1086/465433. ISSN 0020-7071. JSTOR 1264261.
• Voegelin, C. F. (1941). "Internal Relationships of Siouan Languages". American Anthropologist. 43 (2). [American Anthropological Association, Wiley]: 246–249. doi:10.1525/aa.1941.43.2.02a00080. ISSN 0002-7294. JSTOR 662955.
• Hans Wolff's four-part series on Siouan comparanda:
  • Wolff, Hans (1950). "Comparative Siouan I". International Journal of American Linguistics. 16 (2). University of Chicago Press: 61–66. doi:10.1086/464065. ISSN 0020-7071. JSTOR 1262849.
  • —— (1950). "Comparative Siouan II". International Journal of American Linguistics. 16 (3). University of Chicago Press: 113–121. doi:10.1086/464075. ISSN 0020-7071. JSTOR 1263051.
  • —— (1950). "Comparative Siouan III". International Journal of American Linguistics. 16 (4). University of Chicago Press: 168–178. doi:10.1086/464085. ISSN 0020-7071. JSTOR 1262899.
  • —— (1951). "Comparative Siouan IV". International Journal of American Linguistics. 17 (4). University of Chicago Press: 197–204. doi:10.1086/464129. ISSN 0020-7071. JSTOR 1263103.