I love
Lysander,
Olympia, and
Balthazar (this spelling). They work together exceptionally well as a sibset.
Embla and
Vita are too simple in comparison. I'd delegate them to another set.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080