We just can’t agree!
We’ve narrowed it to three
[name_f]Coraline[/name_f]
[name_f]Rosaline[/name_f]
[name_f]Imogen[/name_f]
Big brothers name is [name_m]Theodore[/name_m] but has always been a [name_u]Theo[/name_u].
Middle names will likely be [name_f]Jane[/name_f] [name_f]Christine[/name_f] or [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f]
[name_f]Rosaline[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f] is gorgeous!!
My favorite is [name_f]Imogen[/name_f], but as someone mentioned [name_f]Rosaline[/name_f] fits better with [name_m]Theodore[/name_m].
Besides it’s not the best slow fifth [name_f]Jane[/name_f] right after [name_f]Imogen[/name_f].
I think I would go with [name_f]Imogen[/name_f]; [name_f]Imogen[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f] or [name_f]Imogen[/name_f] [name_f]Jane[/name_f] [name_f]Christine[/name_f] are beautiful options.
I really like [name_u]Theo[/name_u] and [name_f]Immy[/name_f] together as nicknames.
I think [name_f]Imogen[/name_f] flows the best with the middle names, but I slightly prefer [name_f]Coraline[/name_f] as a first name. All sound great with [name_u]Theo[/name_u]/[name_m]Theodore[/name_m] and all have cute nicknames ([name_f]Ginny[/name_f], [name_f]Cora[/name_f], [name_f]Rosie[/name_f], etc) so I don’t think you can go wrong.
Coraline or Imogen are both great choices. I like that Corali e could sometimes be Cora. It feels in line with Theodore nn Theo but isn’t too matchy.
Imogen without a nickname feels great with Thedore or Theo though too!
With Coraline I quite like Jane Elizabeth, though I think Elizabeth Jane might flow a touch better.
With Imogen I like Jane Christine.
Definitely [name_f]Imogen[/name_f].
[name_f]Adore[/name_f] [name_f]Imogen[/name_f]!
[name_u]Love[/name_u] [name_f]Imogen[/name_f] for you
I’m loving [name_f]Rosaline[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f] or [name_f]Imogen[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f]. I think both work with the brother name, but I slightly prefer the nn [name_f]Rosie[/name_f].
[name_f]Imogen[/name_f] is my favourite, especially with [name_m]Theodore[/name_m] “[name_u]Theo[/name_u]”, and I really love [name_f]Imogen[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f]!
[name_m]Theodore[/name_m] and [name_f]Imogen[/name_f] is so beautiful 
I vote for [name_f]Coraline[/name_f].
But I like [name_f]Coraline[/name_f] [name_f]Elizabeth[/name_f] [name_f]Jane[/name_f] better than [name_f]Coraline[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f].
I love [name_f]Rosaline[/name_f]! I think it is a perfect match for [name_m]Theodore[/name_m] nn [name_u]Theo[/name_u]. [name_f]Rosaline[/name_f] [name_f]Jane[/name_f] [name_f]Elizabeth[/name_f] would be a precious name. [name_f]Rosaline[/name_f] [name_f]Jane[/name_f] [name_f]Christine[/name_f] is nice too.
I think [name_f]Coraline[/name_f] is my second favorite.