Ok, so I’m not pregnant, but we’re considering trying for #4! What would you name a sibling for Violet Elizabeth Rose, Hugo Alexander John and Darcy Samuel James? Obviously, two middles is a requirement! My thoughts so far…
Alice
Beatrix
Susannah
Edward
Louis
Sebastian
Any additions to our list?
Your children have wonderful names!
A few suggestions that could fit off the top of my head are:
[name_f]Mary[/name_f]
[name_f]Jane[/name_f]
[name_f]Madeline[/name_f] / [name_f]Madeleine[/name_f]
[name_f]Grace[/name_f]
[name_f]Ruth[/name_f]
[name_f]Sally[/name_f]
[name_f]Molly[/name_f]
[name_f]Charlotte[/name_f]
[name_f]Clara[/name_f]
[name_f]Nora[/name_f]
[name_f]Eleanor[/name_f]
[name_u]Willow[/name_u] / [name_f]Willa[/name_f]
[name_f]Audrey[/name_f]
[name_f]Genevieve[/name_f]
[name_f]Juliet[/name_f]
[name_f]Adelaide[/name_f] / [name_f]Adeline[/name_f]
[name_f]Scarlett[/name_f]
[name_f]Lucy[/name_f]
[name_f]Matilda[/name_f]
[name_f]Poppy[/name_f]
[name_f]Daisy[/name_f]
[name_f]Blythe[/name_f]
[name_f]Hazel[/name_f]
[name_f]Stella[/name_f]
[name_f]Ivy[/name_f]
[name_u]Finley[/name_u]
[name_m]William[/name_m]
[name_m]Charles[/name_m]
[name_u]Robert[/name_u]
[name_m]Arthur[/name_m]
[name_m]Thomas[/name_m]
[name_m]Lewis[/name_m]
[name_u]Benjamin[/name_u]
[name_u]Oliver[/name_u]
[name_u]Wesley[/name_u]
[name_m]Theodore[/name_m]
[name_u]Jasper[/name_u]
[name_m]Casper[/name_m]
[name_u]August[/name_u]
[name_m]Henry[/name_m]
[name_u]Harry[/name_u]
[name_u]George[/name_u]
[name_m]Andrew[/name_m]
[name_m]Nicholas[/name_m]
[name_m]Jack[/name_m]
[name_m]Adam[/name_m]
[name_u]Daniel[/name_u]
[name_m]David[/name_m]
[name_m]Joseph[/name_m]
[name_m]Matthew[/name_m]
So exciting! I would definitely stick to another two syllable name, personally, so [name_f]Alice[/name_f] & [name_m]Louis[/name_m] from your lists.
Flora/Florence
[name_f]Tessa[/name_f]
[name_f]Stella[/name_f]
[name_f]Daphne[/name_f]
[name_f]Gemma[/name_f]
[name_f]Clara[/name_f]
[name_f]Sophie[/name_f]
[name_f]Lucy[/name_f]
[name_f]Audrey[/name_f]
[name_f]Elise[/name_f]
[name_f]Margot[/name_f]
[name_f]Molly[/name_f]
[name_f]Frances[/name_f]
[name_u]Callum[/name_u]
[name_u]August[/name_u]
[name_m]Oscar[/name_m]
[name_u]Jasper[/name_u]
[name_u]Milo[/name_u]
[name_u]Arlo[/name_u]
[name_u]Theo[/name_u]
[name_u]Maxwell[/name_u]
[name_m]Reuben[/name_m]
[name_u]Francis[/name_u]
[name_m]Franklin[/name_m]
[name_m]Frederick[/name_m]
[name_m]Felix[/name_m]
[name_m]Albert[/name_m]
[name_u]Luca[/name_u]
[name_m]Silas[/name_m]
[name_u]Hollis[/name_u]
[name_m]Edmund[/name_m]
Beatrix or Sebastian! I adore both and they go wonderfully with your children’s fantastic names. Louis and Alice work brilliantly too.
Names I’d consider for a sibling to Violet, Hugo and Darcy:
Clementine
Thea
Margaux
Willa
Flora
June
Astrid
Iris
Araminta
Matilda
Olive
Alba
Clara
Paloma
Nell
Marigold
Ada
Imogen
Eloise
Freya
Clover
Amelie
Isobel
Saskia
Audrey
Juniper
Ophelia
Edith/Edie
Allegra
Wilhelmina
Etta
Maple
Cecilia
Fern
Tabitha
Lucien
Otis
Rory
Atticus
Bastian
Remy
Caspar
Magnus
Felix
Rafferty
Silas
Jude
Rex
Angus
Wilfred
August
Flynn
Maximilian
Oscar
Axel
Jasper
Winston
Kit
Leopold
Cyrus
Orson
Franklin
Wilbur
Ambrose
Theodore
Phineas
Soren
Raphael
Xavier
Asher
Caspian
My favourites with your kids’ names are Lucien, Felix, Atticus, Oscar and August and Clementine, Matilda, Clara, Willa and Olive.
With [name_f]Violet[/name_f] , [name_m]Hugo[/name_m] and [name_u]Darcy[/name_u] I can totally see an
[name_f]Alice[/name_f] [name_f]Susannah[/name_f] [name_f]Bea[/name_f]
[name_m]Edward[/name_m] [name_m]Louis[/name_m] [name_m]Sebastian[/name_m]
Both names have 2 syllables and I think match the older 3
I will suggest
[name_f]Margaret[/name_f]
Gwen/ [name_f]Gwendolyn[/name_f]
Winnifred/ [name_f]Winnie[/name_f]
[name_f]Millie[/name_f]
[name_m]Charles[/name_m]
[name_m]William[/name_m]
[name_u]Michael[/name_u]
[name_m]Hi[/name_m] there.
Your kids’ names are cute!
Here are my thoughts on what you’ve got so far:
Girls-
Alice-Alice is so sweet. It’s old fashioned & quiet but well put together & isn’t terribly popular. It fits in w/your crew nicely.
Beatrix-Love it! One of my very favorites. Such a great balance of femininity, clever, quirky & spunky. It kind of goes even better w/your sibling set too.
Susannah-Another lovely choice, although I prefer [name_f]Susanna[/name_f] for some reason. Which is weird, because I really need the ‘h’ at the end of [name_f]Sarah[/name_f] & [name_f]Hannah[/name_f]. 
But I like this either way. It’s unexpected but classic & has a lot of great nns if you’re into those. I like [name_f]Sadie[/name_f], [name_f]Sally[/name_f], [name_u]Scout[/name_u], [name_f]Anna[/name_f] or [name_f]Annie[/name_f].
Here are a few girl suggestions:
[name_f]Clover[/name_f]
[name_f]Freya[/name_f]
[name_f]Greta[/name_f]
[name_f]Gemma[/name_f]
[name_f]Hattie[/name_f]
[name_f]Lola[/name_f]
[name_f]Phoebe[/name_f]
[name_u]Ruby[/name_u]
[name_f]Tallula[/name_f]
Boys-
Edward-Edward is a nice solid classic. I find it a little more…bland, I guess…then [name_m]Hugo[/name_m] & [name_u]Darcy[/name_u]. But I love the nn [name_u]Teddy[/name_u]! And that would fit in well.
Louis-That’s charming & sweet & classic.
Sebastian-I love this name. It’s kind of longer & fancier than your kids’ names, but it doesn’t not fit.
A few boy ideas:
[name_m]Arthur[/name_m]
[name_m]Clive[/name_m]
Edwin-this seems to fit better for some reason.
Frederic/Freddie
[name_u]George[/name_u]
[name_u]Kit[/name_u]
[name_m]Leo[/name_m]
[name_u]Max[/name_u]
[name_u]Milo[/name_u]
[name_u]Oliver[/name_u]
[name_m]Oscar[/name_m]
[name_m]Simon[/name_m]
[name_m]Winston[/name_m]
[name_f]Hope[/name_f] this helps. 
All your options fit perfectly!!
I’d add in:
[name_f]Eleanor[/name_f]
[name_f]Imogen[/name_f]
[name_f]Ada[/name_f]
[name_u]Evelyn[/name_u]
[name_f]Olive[/name_f]
[name_f]Rebecca[/name_f]
[name_f]Felicity[/name_f]
[name_u]Florence[/name_u]
[name_f]Harriet[/name_f]
[name_m]Edwin[/name_m]
[name_m]Vincent[/name_m]
[name_u]Laurence[/name_u]
[name_m]Clarence[/name_m]
[name_u]Ashby[/name_u]
[name_u]Ellis[/name_u]
[name_m]Benedict[/name_m]
[name_m]Raphael[/name_m]
That’s so exciting! I love your style.
As @futuremama said, [name_f]Alice[/name_f] and [name_m]Louis[/name_m] from your list seem like good fits for your set – they match the two-syllable, vintage pattern of the others. But I think my favorites for you are [name_f]Beatrix[/name_f] and [name_m]Edward[/name_m], which both match the more romantic feel of your older children’s names. [name_f]Susannah[/name_f] and [name_m]Sebastian[/name_m] could work, but they might work better as middle names in your set as they are quite a bit longer than [name_f]Violet[/name_f], [name_m]Hugo[/name_m], and [name_u]Darcy[/name_u].
I’d recommend these for you:
[name_m]Albert[/name_m]
[name_m]Edmund[/name_m]
[name_m]Felix[/name_m]
[name_m]Gilbert[/name_m]
[name_m]Peter[/name_m]
[name_u]Sidney[/name_u]
[name_m]Walter[/name_m]
[name_f]Adele[/name_f]
[name_f]Alma[/name_f]
[name_f]Audrey[/name_f]
[name_f]Estelle[/name_f]
[name_f]Fleur[/name_f]
[name_u]Florence[/name_u]
Louisa/Louise
But I am definitely rooting for [name_f]Beatrix[/name_f] or [name_m]Edward[/name_m]!