From your list, I love [name_f]Celeste[/name_f], [name_f]Celia[/name_f], [name_f]Juliet[/name_f], and [name_f]Gemma[/name_f] with O’[name_f]Malley[/name_f].
Really, [name_f]Ava[/name_f], [name_f]Ella[/name_f], and [name_f]Isabel[/name_f] are lovely with O’[name_f]Malley[/name_f] as well, only, I find them very over-used. If popularity isn’t a factor for you, then I’d say you have a list of winners.
[name_f]Ava[/name_f] O’[name_f]Malley[/name_f] is the best. I love [name_f]Juliet[/name_f] too, but [name_u]Julie[/name_u] would flow better. [name_f]Vienna[/name_f], [name_f]Charlotte[/name_f], [name_f]Lily[/name_f], [name_f]Catherine[/name_f] ([name_f]Katherine[/name_f]), or [name_f]Violet[/name_f] is cute
I like [name_f]Ava[/name_f] O’[name_f]Malley[/name_f], [name_f]Celeste[/name_f] O’[name_f]Malley[/name_f], & [name_f]Gemma[/name_f] O’[name_f]Malley[/name_f] the best.
I think you have a great and hard to choose from list. They all sound good with O’[name_f]Malley[/name_f] though I think my favorite is [name_f]Ava[/name_f].
What about
[name_u]Jordan[/name_u]
[name_f]Brenna[/name_f]
[name_f]Erin[/name_f]
[name_u]Larkin[/name_u]
[name_f]Nora[/name_f]
I really like [name_f]Ava[/name_f] and [name_f]Gemma[/name_f] best with O’[name_f]Malley[/name_f]. [name_f]Ava[/name_f] is very popular though so [name_f]Gemma[/name_f] wins for me. [name_f]Do[/name_f] you like [name_f]Audrey[/name_f] at all? [name_f]Audrey[/name_f] O’[name_f]Malley[/name_f] is very nice