Source : Webster's Revised Unabridged Dictionary (1913)

Klamaths \Kla"maths\, n. pl.; sing. {Klamath} (Ethnol.)
   A collective name for the Indians of several tribes formerly
   living along the Klamath river, in California and Oregon, but
   now restricted to a reservation at Klamath Lake; -- called
   also {Clamets} and {Hamati}.