Found a Chacon family living in Pocatello, Idaho.
The name "Pocatello" comes from an Indian chief of the Shoshone tribe who granted the railroad a right-of-way through the Fort Hall Indian Reservation.
Shoshone and Bannock Indian tribes inhabited southeastern Idaho for hundreds of years before the epic trek by Lewis and Clark across Idaho in 1805. Their reports of the many riches of the region attracted fur trappers and traders to southeastern Idaho.
Hope this helps