Ok, I'm back to suggest Norse names as I know you want to honor your side of things too. I considered several of these myself ^_^
Elida (love the meaning)
Others you might like (most are Greek with some Roman and Celtic in there):
Alcyone (I know you considered this one last time and it's still lovely and sounds great with Aphrodite)
Isis (I know this is out of left field and a major deity from Egypt which I don't know how you feel about, but it's beautiful, sounds great with Aphrodite, and is a strong woman like you want. Aside form that, an acquaintance has a 2 year old Isis and I just love it)
Nausicaa (I'm seconding this from someone up there. It's very nice and other than being Greek mythology, it's a beautiful anime)
Alright I went through most of these on the last thread so I'm just going to categorize them and add my two cents to the ones I feel the most strongly about or something...
Belpheobe - point out to the hubby that it would be a fun link to Ditaroo's -ph-, unless that would make him dislike it more.
Hermione - this could be a great "normal" name, don't you think? HP really made this more "main stream" and "normal".
Lysistrata - though I could see this leading to quite a bit of teasing in school.
Cleopatra - it's a little too on the nose. I don't even know what I'd name a third daughter after Aphrodite and Cleopatra but they are equally bold.
Isolde - she was beautiful, pure and tragic. (I think.... I see your point).
Musidora - theoretically I like it but it sounds awkward to me out loud.
Olympia - usually I love this just not for you.
Pandeia - I like this so much better than Pandora.
Bradamante - it's on the same Brunhilda/Gertrude level for me. Theoretically beautiful but I just can't fully get there.
Jezebel - no judgement I just don't like the sound.
Xenia - I see hubby's point.
I LOVE your list! These names are really unique, beautiful, and strong, characteristics I base my own favorites on. I like Atalanta, Circe, Cleopatra, Hermione, Isolde, Morgana, and Selene. Serafina sounds nice, but is way too popular.
I've thought about it and I think Belphoebe matches ridiculously well with Aphrodite!