Searching for a book?

I am looking for a book with an indian character named something like tanommy, or tanami...something like that...I don't know the spelling or the story...but I was told that my future stepson was named from this book...the book was read between 1970-1995, Unfortunatly I have no other information....it was just a book with an indian named something like tanomy...sounds like tommy but with an "n"....like ton-nom-mie....ugh...maybe you have read this????? It may have been read in school...Sorry if this is confusing.