Origin of Costanoan
Examples from the Web for costanoan
Historical Examples of costanoan
It is quite true that some of the tribal groups inhabiting this territory may not have been members of the Costanoan stock.
They probably had just left Costanoan territory, although, to be sure, the exact tribal boundaries are unknown.
Kroeber classes Saclan as doubtfully Costanoan, but shows the group as Costanoan on his large colored tribal map.