I know an
Ava, but it's not exactly a good association to make with
Ava. I like
Ava, because it makes me think of
Ava Gardner.
I would use something a little out of the ordinary as far as middlenames go for ava.
Catherine,
Elizabeth, and
Grace are names I've seen countless times with this name...
Ava VeronicaAva AdelaideAva NathalieAva MathildeAva CamilleAva ThereseAva NaomiAva Penelope
etc.