I see this a lot, no one has actual names, or any reference for names, that are legit Native American, varying among the tribes, for their characters.
Babynames.com and shit like that will give you names made up by white people.
However, I’ve got your solution.
Native-Languages is a good website to turn to for knowledge on a lot of native things, including native names. If you’re unsure about the names you’ve picked, they even have a list of made up names here!
Please don’t trust names like babynames.com for native names, they’re made up and often quite offensive to the cultures themselves.