Here are my thoughts:
[name_f]Ffion[/name_f] - I much prefer [name_f]Fiona[/name_f] (which I love), although I’ve heard they don’t actually have the same root? The double F in the beginning just looks weird to me as someone who is not native to [name_f]Ireland[/name_f].
[name_f]Hazel[/name_f] - I like it, but I’ve met way too many dogs named [name_f]Hazel[/name_f]. It’s pretty though.
[name_f]Hestia[/name_f] - I actually [name_u]LOVE[/name_u] [name_f]Hestia[/name_f]! I love the goddess, too. Very under appreciated name I think.
[name_f]Holly[/name_f] - It’s fine but underwhelming compared to the rest of your list. Not bad though.
[name_f]Ismay[/name_f] - Not my style.
[name_f]Judith[/name_f] - It’s fine but I prefer [name_u]June[/name_u] or [name_f]Lilith[/name_f]. It does have a very authoritative vibe to me, which is cool.
[name_f]Margery[/name_f] - Feels too Game of Thrones to me.
[name_f]Morwenna[/name_f] - I love this!! [name_m]Even[/name_m] though it feels a bit “dark,” I like it a lot. Also love Rowena/Rowenna, which has a similar vibe.
[name_f]Myrtle[/name_f] - Reminds me of [name_m]Harry[/name_m] [name_m]Potter[/name_m] and turtles.
[name_f]Nessa[/name_f] - Not bad but kind of eh.
[name_f]Opal[/name_f] - [name_u]Love[/name_u] the stone, but not the sound out loud. A solid choice though.
[name_f]Polly[/name_f] - Not my style.
[name_f]Rhonwen[/name_f] - Very cool name, I love it!
[name_f]Theda[/name_f] - I like it, no strong opinion either way.
[name_f]Una[/name_f] - Since it’s a word in Spanish it doesn’t feel like a name to me.
[name_u]Vega[/name_u] - No strong opinion either way.
Favorites are: [name_f]Rhonwen[/name_f], [name_f]Morwenna[/name_f], and [name_f]Hestia[/name_f].