From these Yuma Indians I take the name for the group now under notice. It contains, besides the Yuma Proper, the Dieguno of San Diego and the Coco-maricopa.
The Coco-maricopa Indians are joint-occupants of certain villages on the Gila; the population with which they are associated being Pima. Alike in other respects, the Pima and Coco-maricopa Indians differ in language, as may be seen from the following table, confirmatory of the testimony of numerous trustworthy authorities to the same effect.
San Diego lies in 32-1/2° north latitude, a point at which the philology diverges—in one direction into Old California, in another into Sonora. I first follow it in the direction of
Old California.
San Diego, as has just been stated, lies in 32-1/2° north latitude. Now it is stated in the Mithridates that the most northern of the Proper Old Californian tongues, the Cochimi, is spoken as far north as 33°. If so, the Dieguno may be Old Californian as well as New; which I think it is; believing, at the same time, that Cochimi and Cuchan are the same words. Again, in the following Paternoster the word for sky = ammai in the Cuchan vocabulary.
Cochimi of San Xavier.
| father | sky | |
| Pennayu | make¸nambà yaa | ambayujui miyà mo; |
| name | men | confess | and | love | all | |
| Buhu | mombojua | tamma | gkomendà | hi | nogodoño | demuejueg gkajim; |
| and | sky | earth | favour | |
| Pennayùla bogodoño gkajim, gui | hi | ambayujup maba yaa | ke¸amete | decuinyi mo puegiñ; |