What I found interesting in reading history is that in 1492 India (which Columbus thought he'd reached) was called Hindustan at that time, so, he didn't call the natives he met "Indians" because he thought he was there, but, in writing back to his sponsors he said he met some people who were "in Deos" as in "people in god" ... hence the name "Indeos" or Indian ......
Hmmm....this sounds like folk etymology to me. I've seen some old maps -- dang, I don't know if I still have the book or not -- I'll have to look for it -- anyway, instead of "America," the map says "Nova India" -- Latin for "New India."
In Deos -- Hmmm....in Latin this would be gods, accusative plural rather than In Deis, ablative plural. In plus accusative is "into," compared to in plus ablative, which is "in."