The Coca were an indigenous group who lived in the eastern part of present day Guadalajara, Mexico. The Cocas were one of the cultures referred to as Chichimeca

Chichimeca

Chichimeca was the name that the Nahua peoples of Mexico generically applied to a wide range of semi-nomadic peoples who inhabited the north of modern-day Mexico and southwestern United States, and carried the same sense as the European term "barbarian"...

 by the Aztecs. They were known to live at the base of the cerro (hill) of Tamara in Xalostotitlán, Jalisco. Eventually they were invaded by the Tecuexe

Tecuexe

The Tecuexe were an indigenous group found in the eastern part of present day Guadalajara, Mexico-History:It is believed that the Tecuexe derived from the dispersion of Zacateco groups from La Quemada. Like the Zacatecos, the Tecuexe were a tribe belonging to the generic "Chichimeca" peoples...

tribe and assimilated within that tribe. There are rumours that their queen had all her treasure buried in the hill.