Typically American. And also, not at all to my taste; not because they're American but ... I dislike
Audrey, and
Audra is the same, only not even authentic;
Brock = Badger, and I don't enjoy animal names on humans with the possible exception of
Leo, but I wouldn't use it, especially since it sounds very much like the Afrikaans verb meaning 'vomit';
Clint is old-Hollywood moved swiftly downmarket; meek office clerk trying for a cowboy image. In fact, I find the sound of all three of them to be ugly.