The linguistically Athab(p)askan-based tribes in the SW, including the Apaches, Navajo are relative newcomers, started arriving from way up north (their closest linguistic relatives are in northern canada and Alaska) about 1000-800 years ago and either pushed others out of what are now their lands (by force), and/or were tough and adaptable enough to occupy fringe areas that other tribes found inhospitable. Most assuredly a bloody business...
Oh, she knows. She’s a doctor and participated in a rather large genetic study of “native americans.”
She looks like a dark Siberian to me, but hot.