Respondents: 26 (This poll is closed)
Okay, combinations I think are brilliant already:
[name_f]Eilidh[/name_f] [name_f]Briar[/name_f]
[name_f]Agnes[/name_f] [name_f]Amelia[/name_f]
Eirys [name_f]Lucy[/name_f]
[name_f]Enid[/name_f] [name_f]Faye[/name_f]
[name_f]Imogen[/name_f] [name_f]Lettice[/name_f]
[name_f]Twila[/name_f] [name_u]Evelyn[/name_u]
^ These are all great. However, some of your other combos could do with tweaking (just in my opinion).
The only suggestions I have is maybe [name_f]Eilidh[/name_f] [name_f]Beatrix[/name_f] instead of [name_u]Ailbhe[/name_u] [name_f]Beatrix[/name_f] and maybe finding a new middle for [name_f]Jemima[/name_f].
[name_m]Don[/name_m]'t like these (nothing really wrong with them combo-wise, they’re just not my taste):
[name_u]Billie[/name_u] [name_f]Cordelia[/name_f]
[name_f]Corliss[/name_f] [name_f]Matilda[/name_f]
[name_f]Fenella[/name_f] [name_f]Clementine[/name_f]
[name_f]Martha[/name_f] [name_f]Bluebell[/name_f]
[name_f]Margo[/name_f] [name_f]Celestine[/name_f]
I like [name_f]Eilidh[/name_f] [name_f]Beatrix[/name_f] a lot, thank you 
A couple of switches which might sound nice are:
[name_f]Enid[/name_f] [name_f]Beatrix[/name_f]
[name_f]Jemima[/name_f] [name_f]Fae[/name_f]
[name_f]Eilidh[/name_f] [name_f]Briar[/name_f] (AY-lee) - pretty
[name_f]Agnes[/name_f] [name_f]Amelia[/name_f] - not usually a fan of alliteration, but this is a very pretty combo
[name_f]Imogen[/name_f] [name_f]Lettice[/name_f] (luh-TEESE) - <3 Imogen, not so much Lettice, sorry. Maybe Imogen Patrice?
Ailbhe Beatrix (Al-va) - prefer Eilidh Beatrix as previously suggested
Fenella Clementine - very pretty
Jemima Rosemary - prefer with Rosemarie, but that might be a personal preference for syllable emphasis/flow.
Twila Eibhlin (EV-lin) or Twila Evelyn - Twila is nms, but this combo is nice
Enid Faye or Magda Fae - voted for Magda Fae <3
Billie Cordelia - Billie is nms, but love Cordelia
Corliss Matilda - lovely
Martha Bluebell - this name seems very quaint, like she’s in a storybook
Eirys Lucy - love. If I could have voted twice, this would have been it.
Margo Celestine - lovely
I really like [name_f]Jemima[/name_f] [name_f]Rosemary[/name_f], [name_f]Imogen[/name_f] [name_f]Lettice[/name_f] and [name_f]Twila[/name_f] [name_f]Eibhlin[/name_f].
Eirys [name_f]Lucy[/name_f] is gorgeous - the little dear got my vote.
These are the ones I really like (I’ve made my faves pretty clear):
[name_f]Imogen[/name_f] [name_f]Lettice[/name_f]
[name_u]Ailbhe[/name_u] [name_f]Beatrix[/name_f] ([name_u]LOVE[/name_u])
[name_f]Twila[/name_f] [name_f]Eibhlin[/name_f] ([name_u]LOVE[/name_u])
[name_f]Enid[/name_f] [name_f]Faye[/name_f] ([name_u]LOVE[/name_u], I’d love it more with the [name_f]Fae[/name_f] spelling :P)
[name_f]Magda[/name_f] [name_f]Fae[/name_f]
[name_f]Corliss[/name_f] [name_f]Matilda[/name_f]- I prefer [name_f]Matilda[/name_f] [name_f]Corliss[/name_f], but I really like [name_f]Matilda[/name_f]
[name_f]Martha[/name_f] [name_f]Bluebell[/name_f]- Not a huge fan of [name_f]Martha[/name_f], but the combos great!
Eirys [name_f]Lucy[/name_f]- I like it, and I like the look of Eirys as well, but the ‘s’ sound is a bit too much for me. Maybe Eirys [name_f]Cordelia[/name_f] [name_f]Lucy[/name_f] or Eirys [name_f]Matilda[/name_f] [name_f]Lucy[/name_f] so there’s another name to break it up?
I love [name_f]Twila[/name_f] [name_u]Evelyn[/name_u] and the suggestion of [name_f]Jemima[/name_f] [name_f]Fae[/name_f]!
From your poll, I think [name_f]Margo[/name_f] [name_f]Celestine[/name_f] is quite lovely. [name_f]Martha[/name_f] [name_f]Bluebell[/name_f] is a unexpected pairing. Of course, you couldn’t have both for siblings so I picked [name_f]Margo[/name_f]. [name_f]Jemima[/name_f] [name_f]Faye[/name_f] would be a gorgeous combo.