Just for fun (because I’m not settled on any of these and have a feeling baby #5 is a boy anyways. But at this moment, these are my top 3 to join siblings
A.bel B.enjamin
O.live C.laire
F.ern M.abel
P.earl E.loise
Choices:
Heidi Bird
Rue Marigold
Birdie Katherine
Which gets your vote? Thanks in advance!
[name_f]Rue[/name_f] [name_f]Marigold[/name_f]!
[name_f]Heidi[/name_f] [name_f]Bird[/name_f] gets my vote, though all your other girls have noun names, so I would consider following the pattern so #5[name_f][/name_f] doesn’t feel left out. Not a big worry though.
Definitely! Always love/have noun names in mind but don’t want to pigeonhole ourselves either if the name doesn’t feel right.
[name_f][/name_f]Thanks for your vote!
Rue Marigold for sure! Followed by Heidi Bird though I would probably go with Heidi Dove or Heidi Avelot or Heidi Robin.
[name_f]My[/name_f] left-field vote is [name_f]Heidi[/name_f] [name_f]Marigold[/name_f]! Maintains the vintage feel, avoids the pigeonhole, and it just so gorgeous. Feels like a summer meadow.
[name_f][/name_f]Otherwise I have a massive soft spot for [name_f]Birdie[/name_f] [name_f]Katherine[/name_f] 
casting my vote for [name_f]Birdie[/name_f] Katherine!! Quirky vintage first name like the other girls’, with a sweet classic middle name. Plus, both [name_f]Birdie[/name_f] and [name_f]Katherine[/name_f] are just beautiful 
Oh my goodness! I adore your kids’ names 
All 3 choices are beautiful, but my personal favorite is Heidi Bird 
I like that she adds a bit more balance for A b e l, she flows well with big siblings’ names, & I love the sound/imagery of Heidi Bird 
[name_f]Birdie[/name_f] [name_f]Katherine[/name_f] gets my vote!
I love [name_f]Heidi[/name_f] with your girls! Also love the suggestion of [name_f]Heidi[/name_f] [name_f]Marigold[/name_f] 
Heidi! I love the name - it’s happy and confident - and I think it has a lot of staying power. To me, and obv take or leave as not objective, your other girls’ names can last all ages and contexts whereas Birdie feels like it has peaks at under 15 or over 75. I prefer Birdie - and Rue for that matter - as a nickname (eg for Bridget or Beatrice).
Meanwhile, Rue doesn’t seem as pretty and feminine to me as your other girls’ names. I like it, but it is more unisex and laid back and Ruby nn Ru would be a better option with your others.
So, how about:
Ruby Katherine nn Ru
Heidi Marigold (like that suggestion!)
Heidi Bird/Starling/Wren/Sparrow nn Birdie
I also like how Heidi and to some extent Ruby link more to Ab*l.
[name_f]Rue[/name_f] [name_f]Marigold[/name_f]
[name_f]Birdie[/name_f] [name_f]Katherine[/name_f] is my favorite but [name_f]Heidi[/name_f] [name_f]Bird[/name_f] sounds really good with your other kids so either of those. Im not really digging [name_f]Rue[/name_f] with your other kids and I like the other combos much more.
Ooh, using [name_f]Birdie[/name_f] as a nickname for [name_f]Heidi[/name_f] [name_f]Bird[/name_f] is genius! Two birds one stone! (That was a horrible pun and I will see myself out)
[name_f]Birdie[/name_f] [name_f]Katherine[/name_f]
Nah, get the finger guns out
[name_f]Heidi[/name_f] [name_f]Bird[/name_f] is gorgeous 
Your naming taste is so gorgeous!
[name_f][/name_f]Your kiddos are beautifully named and I love your short list.
[name_f][/name_f]Looking at your shortlist further my favourite is [name_f]Heidi[/name_f] [name_f]Bird[/name_f] 
[name_f]Heidi[/name_f] is such a sweet, joyous vintage choice that feels bright and has the lovely meaning noble. I also think [name_f]Heidi[/name_f] balances out sibling set as the names are not so noun heavy which brings Ab3l back into picture nicely. However [name_f]Heidi[/name_f] still has that soft vintage flair of your girls along with feeling homespun. I think the middle name [name_f]Bird[/name_f] is perfection she’s so fun and feels in keeping with the noun names of the girls. Honestly [name_f]Heidi[/name_f] [name_f]Bird[/name_f] is stunning and I also think you could have the nickname [name_f]Birdie[/name_f] which would be fun.
[name_f][/name_f][name_f]Hope[/name_f] this helps
[name_f]Birdie[/name_f] [name_f]Katherine[/name_f] is soooo perfect for your sibset!!
It’s [name_f]Heidi[/name_f] for me. Sweet and spirited. I’m guessing [name_f]Bird[/name_f] is largely so you can use [name_f]Birdie[/name_f] as a nickname. I would keep workshopping the middle name if you don’t love it as a standalone, since the nickname may or may not work out. Other avian ideas that still work with the nickname:
[name_f][/name_f][name_f]Heidi[/name_f] [name_m]Robin[/name_m]
[name_f][/name_f][name_f]Heidi[/name_f] [name_f]Lark[/name_f]
[name_f][/name_f][name_f]Heidi[/name_f] [name_m]Finch[/name_m]
[name_f][/name_f][name_f]Heidi[/name_f] [name_f]Nightingale[/name_f]
And a few other nature ideas:
[name_f][/name_f][name_f]Heidi[/name_f] [name_f]Plum[/name_f]
[name_f][/name_f][name_f]Heidi[/name_f] [name_f]Clementine[/name_f]
[name_f][/name_f][name_f]Heidi[/name_f] [name_f]Bloom[/name_f]
[name_f][/name_f][name_f]Heidi[/name_f] [name_f]Saffron[/name_f]
[name_f]Birdie[/name_f] [name_f]Katherine[/name_f] is great but I hesitate because it would be the third name starting with the ‘er’ sound.