This is the kind of name that I don't object to at all, but don't like.
I really like the name
Peter, so I suppose that's kind of incongruous.
Petra seems like a nickname to me, and it's just a set of very meh sounds to me.
But hey, if I met a child named
Petra, I wouldn't hate to see it.
Andrew
put a smile on your face - make the world a better place (: