The Tataviam (Kitanemuk: people on the south slope) were a Native American group in southern California. They traditionally occupied an area in northwest present-day Los Angeles County and southern Ventura County, primarily in the upper basin of the Santa Clara River, the Santa Susana Mountains, and the Sierra Pelona Mountains. They were distinct from the Kitanemuk and Gabrielino-Tongva. The Tataviam were called the Alliklik by their neighbors, the Chumash (Chumash: meaning grunter or stammerer, probably because they spoke a different language).