 Either "Gabrieleño" or "Gabrielino" is part of every official tribal name.The territory which in historical times was occupied by the Kizh (pronounced "Keech", meaning "People of the willow houses") had been inhabited by Native Americans for more than 10,000 years.A prehistoric milling area estimated to be 8,000 years old was discovered in 2006 at the base of the San Gabriel Mountains near Azusa, California.