Hi there.
Here are my thoughts-
Girls:
Tabitha [name_f]Wednesday[/name_f]-I love the sound of it, but I don’t like how they’re both witch-y character names. [name_f]Wednesday[/name_f] Addams isn’t a witch, but she’s still a spooky character.
Eloise [name_f]Bloom[/name_f]-I don’t care much for [name_f]Bloom[/name_f], but [name_f]Eloise[/name_f] is so lovely. Sweet, smart, a little bookish, simple, classic & not too popular.
Lucinda [name_f]Rose[/name_f]-This is the only ‘[name_f]Lucy[/name_f]’ name that I don’t care for. It sounds like a mean old lady to me. No idea why.
Fiona [name_f]Marigold[/name_f]- 
[name_f]Fiona[/name_f] is my dog’s name, so my heart melts when I see it. 
[name_f]Marigold[/name_f] is daring in the mn spot too.
Morwenna [name_f]Violet[/name_f]-That’s really nice! [name_f]Morwenna[/name_f] is very unique, but not too weird. I think that it sounds strong, smart, feminine & a tad exotic. Plus, it has the cute nn of [name_f]Winnie[/name_f]. [name_f]Morwenna[/name_f] [name_f]Violet[/name_f] has a great flow & balance of styles.
Zelda [name_f]Rosemary[/name_f]-A little heavy for me, to be honest. An interesting combo though. I prefer [name_f]Zella[/name_f].
Ruby [name_f]Theodosia[/name_f]-Ooh, interesting. I’m not usually into [name_f]Theodosia[/name_f], but [name_u]Ruby[/name_u] [name_f]Theodosia[/name_f] is kind of fun & unexpected.
Dinah [name_f]Avonlea[/name_f]-Not loving this combo personally. I want to like [name_f]Dinah[/name_f], but it just doesn’t sound pretty to me.
Seraphina [name_f]Esther[/name_f]-I’m in the minority, but I can’t see the appeal of [name_f]Seraphina[/name_f]. It sounds clunky somehow. I like [name_f]Esther[/name_f] in general, but this combo is too ‘s’ & ‘r’ heavy.
Helena [name_f]Rosamund[/name_f]-Nice combo, but I don’t care for [name_f]Helena[/name_f]. [name_f]Elena[/name_f] [name_f]Rosamund[/name_f] would be good.
Guinevere [name_f]Hazel[/name_f]-I LOVE [name_f]Guinevere[/name_f]. She’s my #1 girl & has been for over…gosh, almost 20 years. I don’t love [name_f]Hazel[/name_f], but I don’t mind this combo. It flows well.
Zoe [name_f]Paloma[/name_f]-[name_f]Zoe[/name_f] is just really over done, but I do quite like this combo. [name_f]Paloma[/name_f] makes [name_f]Zoe[/name_f] seem more interesting & exotic.
Leah [name_f]Marigold[/name_f]-That’s pretty. Simple, feminine, classic. Not terribly exciting, but nice enough.
Boys:
Levi [name_m]Caspian[/name_m]-I like it. It has a nice flow. Not super exciting, but a good name.
Cedric [name_u]Rune[/name_u]-That just reminds me of some kind of ruins.
Simon [name_u]Sparrow[/name_u]-Hm. [name_m]Simon[/name_m] is quirky, smart, classic & handsome. I like [name_u]Sparrow[/name_u] more for a girl, but this combo is kind of interesting.
Edmund [name_m]Percival[/name_m]-Kind of cute, but just a bit stuffy honestly.
Florian [name_m]Arthur[/name_m]-Cool combo, but I just can’t get into [name_u]Florian[/name_u].
Levi [name_m]Percival[/name_m]-I much prefer [name_u]Levi[/name_u] [name_m]Caspian[/name_m].
Theodore [name_u]Idris[/name_u]-[name_m]Theodore[/name_m] is charming. I don’t mind [name_u]Idris[/name_u], but this doesn’t flow well in my opinion.
Finnian [name_u]True[/name_u]-Aw, I love [name_m]Finnian[/name_m]. It’s handsome, witty, sporty & interesting. [name_u]True[/name_u] isn’t my cup of tea, but a nice combo none the less.
Hope this helps. 
your list is beautiful!!