Was really interested to see this post as I love the name Claudia too and have it on my wish list if bubs #2 is a girl. Like you though I am worried about it being shortened to Claude. There was a girl I work with called Claudine who was called Claude.

Claudi sounds kind of cute though - better than Claude and positve to see that others have said they wouldn't think of shortening it.

I love the name Ava too but prefer Claudia. Just beautiful.