Nahuatl: 1.500.000 Speakers
Quechua: 10.000.000 Speakers
And they've never lived on the reservation.
(though I dont exactly know why people ask if some stuff could please be accepted, it is not like it is gonna change your score after the fact...)
Other good Welsh place names include "Plwmp" and "Nantycaws" (which translates to "stream of cheese").