Neither names are quite my style, but I would have to pick [name]Kelsey[/name]. [name]Lesley[/name] is one of those unisex names that, while more popular on girls, I consider to be for the boys.
I think [name]Ava[/name] is still too popular for there to be “the new [name]Ava[/name]” any time soon, but I have noticed a rise in [name]Aria[/name]'s popularity around here. I still haven’t met one in real life. I know tons of Avas/Evas though. I’m attributing this to it being a regional thing. I can definitely see [name]Ava[/name] and [name]Aria[/name] sharing popularity.