This is such a tough choice, all of your options are beautiful!
I think [name_f]Persephone[/name_f] is my favorite. I might be biased though because it’s a name I love with my whole heart, but am unsure if I can ever use. I do think it sounds nice with big brothers names, though!
I also like [name_f]Octavia[/name_f], [name_f]Olympia[/name_f], [name_m]Calixto[/name_m], [name_f]Minerva[/name_f], and [name_f]Cassiopeia[/name_f].
[name_f]Octavia[/name_f] and [name_f]Olympia[/name_f] are both strong, and sweet and I love the ‘O’ connection to her brothers names. I like [name_m]Calixto[/name_m] for this reason too (also not sure if you do nicknames, but I really love [name_f]Calla[/name_f] for it!), but I’m not sure if three names ending in ‘o’ is too much for you.
[name_f]Minerva[/name_f] is spunky and very pretty, and also unique while still being familiar.
[name_f]Cassiopeia[/name_f] is stunning, and might be the best pairing with H and A. I usually hear it pronounced with ‘pee’ instead of ‘pay’ though, so you might have to correct some people.
You can’t go wrong with any of your names though, they’re all wonderful!