1.
Athena is one of my dd's favorite names. Just in case you're interested, the other names she likes with it are:
Demetria,
Rhea,
Artemis,
Gaia,
Poseidon,
Apollo, and
Kronos. Yes, I know. She's an unusual 10-year old. ;-) She loves Greek, Egyptian and Norse mythology. Of your sibset, I like
Athena and
Calypso together.
Sophocles is a bit much for me even though I enjoy the sound of it.
2. Combos: I like
Athena Soleil and
Athena Zoe. I also like:
Athena Joelle,
Athena Corinne,
Athena Daphne,
Athena Cassandra,
Athena Juliet,
Athena Laurel,
Athena Marisol,
Athena Penelope,
Athena Rosemary,
Athena Rosalind,
Athena Victoria.
3. I can't see
Athena becoming too popular. I'm hoping it'll be relatively uncommon when my dd has her babies.