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Uralo-Siberian is a hypothetical language family consisting of Uralic, Yukaghir, Chukotko-Kamchatkan and Eskimo-Aleut. Most linguists still consider this theory speculative and its evidence insufficient to conclusively prove genetic affiliation.

Contents 1 History 2 Evidence 2.1 Phonology 2.2 Morphology 2.3 Lexicon 3 Urheimat 4 Relationships 5 Sources 6 See also 7 External links

Structural similarities between Uralic and Eskimo-Aleut languages were observed early. In 1746, the Danish theologian Marcus Wöldike compared Greenlandic to Hungarian. In 1818, Rasmus Rask considered Greenlandic to be related to the Uralic languages, and presented a list of lexical correspondences. (Rask also considered Uralic and Altaic to be related to each other.) In 1959, Knut Bergsland published the paper The Eskimo-Uralic Hypothesis, in which he, like other authors before him, presented a number of grammatical similarities and a small number of lexical correspondences. In 1962, Morris Swadesh proposed a relationship between the Eskimo-Aleut and Chukotko-Kamchatkan language families. In 1998, Michael Fortescue presented more detailed arguments in his book, Language Relations across Bering Strait.

The consonant inventories of the reconstructed proto-languages of the four Uralo-Siberian families are very similar to each other. A common feature is that there are only voiceless and no voiced stops, while there is a set of voiced (but no voiceless) non-sibilant fricatives with the same places of articulation (labial, dental, palatal and velar; in Chukotko-Kamchatkan and Eskimo-Aleut, also uvular). There are also nasals in the same places of articulation. In addition, there are three sibilants, as well as liquids and semivowels.

Apparently shared elements of Uralo-Siberian morphology include the following:

*-t	plural
*-k	dual
*m-	1st person
*t-	2nd person
*ka	interrogative pronoun
*-n	genitive case

Fortescue (1998) lists 95 lexical correspondence sets with reflexes in at least three of the four language families, and even more shared by two of the languages. Examples are *ap(p)a 'grandfather', *kað'a 'mountain' and many others.

Fortescue argues that the Uralo-Siberian proto-language (or a complex of related proto-languages) may have been spoken by mesolithic hunting and fishing people in south-central Siberia (roughly, from the upper Yenisei river to Lake Baikal) between 8000 and 6000 BC, and that the proto-languages of the derived families may have been carried northward out of this homeland in several successive waves down to about 4000 BC, leaving the Samoyedic branch of Uralic in occupation of the Urheimat thereafter.

Some or all of the four Uralo-Siberian families have been included in more extensive groupings of languages (see links below). Fortescue's hypothesis does not oppose or exclude these various proposals. In particular, he considers that a remote relationship between Uralo-Siberian and Altaic (or some part of Altaic) is likely. However, Fortescue holds that Uralo-Siberian lies within the bounds of the provable, whereas Nostratic may be too remote a grouping to ever be convincingly demonstrated.

• Knut Bergsland (1959) The Eskimo-Uralic hypothesis. Journal de la Societé Finno-Ougrienne, 61, 1-29.
• Michael Fortescue (1998) Language Relations across Bering Strait. ISBN 0-304-70330-3.

• Eurasiatic languages
• Indo-Uralic languages
• Nostratic languages
• Ural-Altaic languages

• Linguistlist post about Uralo-Eskimo grammar as reconstructed by Uwe Seefloth, who finds Uralic and Eskimo-Aleut to be each other's closest relatives within Uralo-Siberian
• Discussion of the above and comparisons to Indo-European
• more discussion of the above