Fat ditto to the two previous posters. Augustana looks/is made up. I would go with
August Anna (gorgeous, though I believe it's one of
Garth Brooks's daughters' names, if that bothers you...no idea how I remember things like that). I prefer
Augustine (on a boy or girl) or
Augustina (always thought it was frilly/silly, but then I saw it on a little girl in a Gap ad and she just rocked the name, totally pulled it off).