What about Audrey for a girl?
It sounds a bit similar to Ari and has the traditional elements like Claudia.

Also- are you thining of having a 3rd... and let's say hypothetically- if it was a boy- would you wish that you'd kept the name Ari for him because you felt it was more masculine?

Just thought it was something to think about.
I like the name Ari for a boy. Not to crash hot on Hillary, but it's a personal taste thing.