Kiona is a place name in Washington
state, and it may
be from the Yakima for "brown hills", though George
in American Place-Names
says that's "possible", not definite.
It may not matter to you, but I really doubt if there were any girls or women in the ancient Yakima culture named "brown hills." The idea of turning place names into given names is a modern one, and it wouldn't be part of most Native American cultures. Of course, people in European-American culture didn't name children things like Brittany
until the last couple of centuries, either.