People in Dakota would know enough to name their kids Lakota if so inclined. But I've known a few in Wyoming on that state's eastern border with the Dakotas who've named their kids with Lakota names.
Mostly Oglala, Sicangu and Hunkpapa.
-archy-/-
In a previous life, we had John Big-eagle living across the Missouri from us, and his wife was Sophie Lowdog.
A major figure among Indians was Prairie-Chicken, who weighed some 500 lbs it was said.
Other last names on our phone route included "Tomahawk" and "Crows-Fly-High."
There is now a college out there called Shintay-Gleshka College, this is named for an Indian who in his lifetime was called Spotted-Tail.