I don't think I'd use these names myself, but I love
Aoife.
I don't know if it was intentional, but both names seems to come from women of great bravery in different forms.
Aoife being a Warrior
Princess and
Jael killing a captain with a tent peg makes them different from the cliché of fair Maidens dying of heartache after the loss of their lover. I know this might seem a bit too dissecting, but though the connection isn't obvious, it's still there. I was originally going to mention how I prefer twin names with a connection, but this one actually had a good one without me realizing it right away.
Alltogether, I like the twins' names very much.