Avra is beautiful. It's not a name I was familiar with, but it's a really lovely feminization.
I always like v-r transitions.
Ara is a bit lacking imo. It feels like a nickname, it needs a bit more. AH-ra would be substantial enough, but when you say stand alone instead of
Arabella, I say it similar to the word air with an a on the end. Visually it just seems to short regardless of pronunciation.