The Pomoan, or Pomo, languages are a small family of seven languages indigenous to northern California spoken by the Pomo people, who formerly occupied the valley of the Russian River and the ClearLake basin. Four languages are extinct, and all surviving languages except Kashaya have fewer than tenspeakers.
Pomoan is a family of seven languages. Their relationship to one another was first formally recognized by John Wesley Powell, who proposed that they be called the "Kulanapan Family". Like many of Powell's obscure nomenclatural proposals, particularly for California languages, "Kulanapan" was ignored. In its place, Pomo, the term used by Indians and Whites alike for Northern Pomo was arbitrarily extended to include the rest of the family. It was thus as "Pomo" that all seven languages were first systematically identified by Samuel Barrett. To avoid complications, Barrett named each of the Pomoan languages according to its geographic position. This naming convention quickly gained wide acceptance and is still in general use, except for the substitution of "Kashaya" for Barrett's "Southwestern Pomo". Regrettably, however, Barrett's geographical language names often lead those unfamiliar with the Pomoan languages to the misconception that they are dialects of a single "Pomo" language. Various genetic subgroupings of the family have been proposed, although the general outlines have remained fairly consistent. The current consensus view favors the tree presented in Oswalt, shown below.
Essentially identical versions of this classifications are presented in Oswalt and McLendon's "Introduction" to the Pomo chapters in Heizer, ed. and in Campbell. The most important dissenter was Abraham M. Halpern, one of the few linguists since Barrett's time to collect comparative data on all of the Pomoan languages. Halpern's classification differed from Oswalt's mainly in the placement of Northeastern Pomo. Instead of considering it an independent branch of the family, Halpern grouped it with the languages of Oswalt's "Western" branch, suggesting the possibility that Northeastern Pomo represents a recent migration of a Northern Pomo subgroup.