Sorry, this is a bit of a cross-post from the siblings board. We don’t know what we’re having yet, but it would be good to get a first/middle girls combo for either 2 girls or 1 of each. We’ve got some names below that we like, but I’m definitely open to other possibilities. I’d prefer something quite classic and timeless. Our last name is Yates.
Girls:
[name]Vivian[/name]
[name]Charlotte[/name] (nn [name]Lottie[/name])
[name]Celia[/name]
[name]Rose[/name] (or some non-Twilight permutation, nn [name]Rosie[/name])
[name]Philippa[/name] (nn [name]Pippa[/name])
[name]Eve[/name]
[name]Aurelia[/name]
[name]Lydia[/name]
[name]Felicity[/name]
[name]Winter[/name]
[name]Heidi[/name]
[name]Penny[/name]
Boys names they might be paired with:
[name]Maxwell[/name]
[name]Felix[/name]
[name]Thomas[/name]
[name]Hudson[/name]
[name]Edmund[/name]
[name]Robert[/name]
[name]Elliott[/name]
[name]Grey[/name]
[name]Peter[/name]
Finnick /[name]Flynn[/name]/[name]Finnegan[/name]
Hallem
[name]Vivian[/name] and [name]Felix[/name] are nice! My favorite sis/ bro twin combo is [name]Julienne[/name] and [name]Jacoby[/name]
You could [name]Rosalind[/name] instead of [name]Rose[/name]. [name]Rosalind[/name] and [name]Celia[/name] would make a good sibset. Shakespearean feel.
I also really like [name]Charlotte[/name] paired with [name]Felicity[/name]. [name]Vivian[/name] and [name]Pippa[/name] work together.
[name]Winter[/name] might be cute for a middle name, but doesn’t really work for a first name with your options.
I really like [name]Hudson[/name] with [name]Charlotte[/name]. Or thomas with [name]Charlotte[/name]. [name]Both[/name] are very classic. Not too mention [name]Thomas[/name] means twin 
I really like your choices and think most of them will work together. Although out of your boy names, Im not really crazy about Finnick (mainly because its so strongly associated with The Hunger Games) and Hallem.
Girl/Girl: [name]Vivian[/name] & [name]Charlotte[/name]
Girl/Boy: [name]Hudson[/name] & [name]Eve[/name]
Boy/Boy: [name]Elliott[/name] & [name]Peter[/name]
Great names!!
Thanks! Combos with middle names?