My name is Ava, but I honestly prefer this way more. Avia just has such elegant and mystical charm to it, and it's very rarely used. I might think of renaming myself this instead! :D.
It doesn't sound masculine at all. I like it a lot better than Ava! Ava is just too short and ends too soon so that's why I would say this one is much better!
St. Avia (Ava) was the niece of King Pepin. In her childhood she was blind but was miraculously healed by St. Rainfredis. She became a nun at Denain in Hainault, now in Belgium, where she later became an abbess.