Which one fits big brother [name_m]Reuben[/name_m] (Roo) the best?
[name_f]Saskia[/name_f] (Sass)
[name_f]Maeve[/name_f] ([name_f]Mae[/name_f])
[name_f]Adelaide[/name_f] ([name_f]Daisy[/name_f])
[name_f]Emilia[/name_f] ([name_f]Emmie[/name_f])
[name_f]Mabel[/name_f] ([name_f]Mae[/name_f])
And why? Any suggestions? Not giving him a sibling for a long while yet but I’m pondering!
Thank you. 
Maeve would make a wonderful addition
First thing that came to mind was [name_f]Estelle[/name_f] “[name_f]Stella[/name_f]”
G
I like [name_f]Mabel[/name_f] or [name_f]Maeve[/name_f] with [name_m]Reuben[/name_m]!
Ruben and [name_f]Mabel[/name_f] is just darling!
Emília
Maybe:
May
Flora
Etta
Olive
Mina
Jess
Another vote for [name_f]Mabel[/name_f] or [name_f]Maeve[/name_f] ! I love the nick name [name_f]Mae[/name_f] and all [name_f]Mae[/name_f] names ([name_f]Mavis[/name_f], [name_f]Mabel[/name_f],[name_f]Maeve[/name_f] etc) I also really like that The B sound is in [name_f]Mabel[/name_f] so it kind of ties [name_m]Rueben[/name_m] and [name_f]Mabel[/name_f] together that’s not too cutesy to sing songy.
All of the names are beautiful! So you can’t go wrong but if I were naming a sibling to [name_m]Rueben[/name_m] this would be my thought process
[name_f]Saskia[/name_f] - gorgeous name but maybe a little more exotic than Roo
[name_f]Emilia[/name_f] - I love [name_f]Emilia[/name_f] and all spellings of it but it might just be a little popular for my taste
[name_f]Adelaide[/name_f] - Roo and [name_f]Daisy[/name_f] are cute siblings !!
Mabel, [name_f]Adelaide[/name_f] nn [name_f]Daisy[/name_f] and [name_f]Emilia[/name_f] would all be perfect with [name_m]Reuben[/name_m]!
Mabel or [name_f]Adelaide[/name_f]!!
[name_m]Hi[/name_m] there.
Here are my rankings & thoughts-
[name_f]Mabel[/name_f]-[name_f]Mabel[/name_f] is so sweet. It’s simple, vintage, a little quirky & not terribly common. That goes really well w/Reuben. And I think that [name_f]Mabel[/name_f] nn [name_f]Mae[/name_f] makes perfect sense.
[name_f]Adelaide[/name_f]-[name_f]Adelaide[/name_f] is beautiful. I think that it’s smart & sophisticated, but I can also very easily picture it on a little girly picking flowers in a meadow. And as for the nn…I’m completely head over heals in love w/the name [name_f]Daisy[/name_f]. I don’t think that it’s a super natural nn for [name_f]Adelaide[/name_f], & maybe that’s why I didn’t rank this #1. Then again, I like [name_f]Dorothy[/name_f] & [name_f]Dorothea[/name_f] nn [name_f]Daisy[/name_f], & I guess that’s also a stretch. Either way, great choice!
[name_f]Maeve[/name_f]-I see [name_f]Maeve[/name_f] similarly as I see [name_f]Adelaide[/name_f]. Sleek & sophisticated, but also [name_m]Little[/name_m] House on the [name_u]Prairie[/name_u]-ish. I just don’t think that [name_f]Maeve[/name_f] nn [name_f]Mae[/name_f] makes a ton of sense either. [name_f]Maeve[/name_f] doesn’t really need a nn. But I suppose Maevey would be the most natural.
[name_f]Emilia[/name_f]-[name_f]Emilia[/name_f] is beautiful. Smart, classic & kind. I just don’t care for [name_f]Emmie[/name_f] though. It’s kind of just too cutesy for some reason. [name_f]Emilia[/name_f] nn [name_f]Millie[/name_f] would be darling. I’d also be concerned that this would be mistaken for [name_f]Amelia[/name_f] a lot.
[name_f]Saskia[/name_f]-I don’t hate [name_f]Saskia[/name_f] in its own, but it’s just not my personal favorite. It sounds a little harsh. And [name_f]Saskia[/name_f] has more of an ‘ah’ sound & Sass seems like it should be a short ‘a’. So, it seems a bit awkward.
[name_m]Even[/name_m] though you have a great list, here are a few suggestions-
[name_f]Aviva[/name_f]/Vivie
[name_f]Annika[/name_f]/Annie
[name_f]Anika[/name_f]/Ani
[name_f]Bianca[/name_f]/Bee
[name_f]Beatrice[/name_f]/Bea/Bess/Bette
[name_f]Beatrix[/name_f]/Bea/Bess/Bette
[name_f]Clementine[/name_f]/Cleo/Minnie
[name_f]Coraline[/name_f]/Cora
[name_f]Cornelia[/name_f]/Cora/Nellie
[name_f]Eve[/name_f]/Evie
[name_f]Greta[/name_f]/Gigi/Gerty
[name_f]Isolde[/name_f]/Izzy/Idgie
[name_u]Juniper[/name_u]/Junie/June/Juno
[name_u]June[/name_u]/Junie
[name_f]Josephine[/name_f]/Posey
[name_f]Miriam[/name_f]/Miri/Mira
[name_f]Matilda[/name_f]/Millie
[name_f]Olive[/name_f]/Livy
[name_f]Phoebe[/name_f]/Bee
[name_f]Penelope[/name_f]/Penny/Polly/Poppy/Nellie
[name_f]Sylvia[/name_f]/Sylvie
[name_f]Susanna[/name_f]/Sally/Sadie/Scout/Annie/Anna
[name_f]Tessa[/name_f]/Tess
[name_f]Talia[/name_f]/Tali
[name_u]Vivian[/name_u]/Vivie
[name_u]Vida[/name_u]/Vivie
[name_f]Zinnia[/name_f]/Zinny
[name_f]Hope[/name_f] this helps. 
Reuben & [name_f]Emilia[/name_f] or [name_f]Mabel[/name_f]
Reuben and [name_f]Emilia[/name_f] (Roo and [name_f]Emmie[/name_f]) sound gorgeous together! I also visually like [name_m]Reuben[/name_m] and [name_f]Maeve[/name_f] for the double vowels as a nice link between brother and sister.
Ruben & [name_f]Mabel[/name_f] are so perfect together! both so sweet and quirky. I also really like [name_f]Emilia[/name_f] and [name_f]Adelaide[/name_f]!
Never thought I would vote for [name_f]Mabel[/name_f] but she is honestly so sweet with [name_m]Reuben[/name_m]! I love the b that ties them together. Roo and [name_f]Mae[/name_f] are super cute too.
Adelaide might be a bit more classy for an older woman, and I love the nn [name_f]Daisy[/name_f].
[name_f]Maeve[/name_f] and [name_f]Adelaide[/name_f] are my picks!
Love [name_u]Love[/name_u] [name_m]Reuben[/name_m] and [name_f]Maeve[/name_f] together!
I’m in the minority here but I really like to see [name_m]Reuben[/name_m] and [name_f]Saskia[/name_f] together! In my mind, I always saw [name_m]Reuben[/name_m] as a modern sounding name, so for that reason [name_f]Adelaide[/name_f] and [name_f]Emilia[/name_f] don’t feel that they are the perfect matches for me because both names are very traditional and old-fashioned. Honestly, I never cared about [name_f]Adelaide[/name_f] but I love [name_f]Daisy[/name_f] 
[name_m]Reuben[/name_m] are [name_f]Daisy[/name_f] are meant to be!
I also agree that [name_m]Reuben[/name_m] sound great next to the sweet and adorable names [name_f]Mabel[/name_f] and [name_f]Maeve[/name_f].
[name_f]My[/name_f] suggestions is [name_f]Beatrix[/name_f] nn [name_f]Bea[/name_f]/Tris!
Saskia is my favourite! I love [name_f]Daisy[/name_f] too, but I don’t think it fits as a nickname for [name_f]Adelaide[/name_f]? [name_f]Maeve[/name_f] would be my second pick, I think!
I adore [name_f]Saskia[/name_f]! Roo and Sass would be adorable together.
Coincidentally, I have a BIL [name_m]Reuben[/name_m] and a cousin-in-law [name_f]Saskia[/name_f]! Both great names.
I also really love [name_f]Mabel[/name_f] “[name_f]Mae[/name_f]” with your son’s wonderful name 
Thank you all sooo much!
@wilkie8709 oh I love [name_f]Stella[/name_f] with [name_m]Reuben[/name_m]! Thank you.
@Babies123456 [name_f]Olive[/name_f] is adorable, thank you.
@MichelleM so well thought out, thank you so much. I like the idea of [name_f]Beatrix[/name_f], [name_u]Juniper[/name_u], [name_f]Matilda[/name_f], [name_f]Penelope[/name_f] and [name_f]Sylvie[/name_f] with [name_m]Reuben[/name_m]!
@leafsgirl44 I have always had [name_f]Daisy[/name_f] as a nn for [name_f]Adelaide[/name_f], I can’t remember how I got there but I have loved it ever since! 
Thank you!
@katinka thank you 
I also love [name_f]Mabel[/name_f] with [name_m]Reuben[/name_m]. They sound great together and the nicknames are so cute. It would be my first choice for you, but I also like [name_f]Saskia[/name_f]. [name_m]Reuben[/name_m] is such a handsome name!