We have three possible names we like:
[name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f] nn [name_f]Aggie[/name_f]
[name_u]Evelyn[/name_u] [name_f]Frances[/name_f]. nn [name_f]Leni[/name_f] or [name_u]Frannie[/name_u]
[name_f]Gwendolyn[/name_f] [name_f]Jane[/name_f] nn [name_f]Winnie[/name_f]
Which do you like best?
Older sisters: [name_f]Sylvia[/name_f] [name_m]Thomas[/name_m] nn [name_f]Sylvie[/name_f], [name_f]Josephine[/name_f] [name_f]May[/name_f] nn [name_u]Josie[/name_u]
Thank you
[name_f]Gwendolyn[/name_f] [name_f]Jane[/name_f] is my favorite. It’s very pretty. The first name is elegant and mature with great nicknames, the middle name is simple and beautiful. It goes really well with [name_f]Sylvia[/name_f] and [name_f]Josephine[/name_f].
My second favorite is [name_u]Evelyn[/name_u] [name_f]Frances[/name_f]. 
With Sylivia [name_m]Thomas[/name_m] and [name_f]Josephine[/name_f] [name_f]May[/name_f] I like [name_f]Gwendolyn[/name_f] [name_f]Jane[/name_f]. [name_f]Sylvie[/name_f], [name_u]Josie[/name_u], and [name_f]Winnie[/name_f] are adorable.
I love the name [name_f]Agnes[/name_f] 
I love [name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f] and [name_u]Evelyn[/name_u] [name_f]Frances[/name_f].
[name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f] would just edge ahead as my favorite.
I’m not keen on [name_f]Gwendolyn[/name_f].
[name_f]Gwendolyn[/name_f] [name_f]Jane[/name_f]
[name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f] sounds wonderful with [name_f]Sylvia[/name_f] and [name_f]Josephine[/name_f]!
I think [name_u]Evelyn[/name_u] [name_f]Frances[/name_f] works best with [name_f]Sylvia[/name_f] and [name_f]Josephine[/name_f]. Second choice would be [name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f]. I’m not a [name_f]Gwendolyn[/name_f] fan myself.
I’m not a fan of [name_f]Gwendolyn[/name_f] or [name_f]Jane[/name_f] but [name_f]Winnie[/name_f] is cute. [name_u]Evelyn[/name_u] [name_f]Frances[/name_f] is lovely and it works well with [name_f]Sylvia[/name_f] [name_m]Thomas[/name_m] and [name_f]Josephine[/name_f] [name_f]May[/name_f]. I also really like [name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f] with your daughters names. [name_f]Sylvie[/name_f], [name_u]Josie[/name_u] and [name_f]Aggie[/name_f] are adorable! [name_u]Evelyn[/name_u] [name_f]Frances[/name_f] is probably my favourite though, I love the name [name_u]Evelyn[/name_u]
If people like [name_f]Winnie[/name_f] but don’t love [name_f]Gwendolyn[/name_f]. Is there another classic name we could use to get to [name_f]Winnie[/name_f]?
I like [name_f]Agnes[/name_f] the best, but if they are truly going to use their nicknames most of the time, I would vote for [name_f]Gwendolyn[/name_f] [name_f]Jane[/name_f]. I like the nickname [name_f]Winnie[/name_f] much better than [name_f]Aggie[/name_f] or [name_f]Leni[/name_f].
From your list, I like [name_u]Evelyn[/name_u] [name_f]Frances[/name_f] with [name_f]Sylvia[/name_f] and [name_f]Josephine[/name_f].
I love [name_f]Winifred[/name_f] nn [name_f]Winnie[/name_f]. I think this name has the vintage charm like your girls names. [name_f]Wilhelmina[/name_f] would be another option.
I was going to say [name_f]Agnes[/name_f] [name_f]Elizabeth[/name_f] because the nn [name_f]Aggie[/name_f] is really cute, but my goodness do I love the nn [name_f]Winnie[/name_f]!! So much love for that name. I’ve been looking for a full name for [name_f]Winnie[/name_f] also, and [name_f]Gwendolyn[/name_f] is perfect!
I love both [name_f]Agnes[/name_f] and [name_f]Gwendolyn[/name_f], but I think [name_f]Agnes[/name_f] really tops it because the nickname [name_f]Aggie[/name_f] just gets me.
I agree with this. [name_f]Gwendolyn[/name_f] fits beautifully and it’s a lovely combo.
My second pick would be [name_u]Evelyn[/name_u].
[name_u]Evelyn[/name_u] [name_f]Frances[/name_f] is my favorite. Second would be [name_f]Gwendolyn[/name_f] [name_f]Jane[/name_f]. I don’t like [name_f]Agnes[/name_f].
Edited for privacy.
[name_f]Winifred[/name_f] is the only other classic [name_f]Winnie[/name_f] name I can think of. There’s also [name_f]Winona[/name_f] and [name_f]Rowena[/name_f] but I don’t think those fit as well with [name_f]Sylvia[/name_f] and [name_f]Josephine[/name_f]. [name_f]Winnie[/name_f] definitely beats [name_f]Aggie[/name_f] and [name_f]Leni[/name_f] for me. Would you do [name_f]Evie[/name_f] for [name_u]Evelyn[/name_u]? That’s more appealing to me. Of course I have a love for [name_f]Gwendolyn[/name_f] anyway and mine goes by [name_f]Gwennie[/name_f].
Since we often use nicknames over full names, I personally really like [name_f]Winnie[/name_f] with [name_u]Josie[/name_u] and [name_f]Sylvie[/name_f]. I am struggling with [name_f]Gwendolyn[/name_f] and [name_f]Winifred[/name_f].
[name_f]Aggie[/name_f] I think is so cute and fresh but my husband just can’t get on board with it.
He really loves [name_f]Frances[/name_f] nn [name_u]Frannie[/name_u] but I worry the name is not quite the right fit with her sisters.
So thus is our conundrum.
I agree that there are a lot of names you can get [name_f]Winnie[/name_f] from other than [name_f]Gwendolyn[/name_f] and [name_f]Winifred[/name_f].
[name_f]Rowena[/name_f] and [name_f]Winona[/name_f] as mentioned.
Also, [name_f]Guinevere[/name_f], [name_u]Rowan[/name_u], [name_f]Gwyneth[/name_f], [name_f]Elowen[/name_f], [name_f]Bronwen[/name_f], [name_f]Arwen[/name_f], [name_f]Anwen[/name_f], [name_u]Whitney[/name_u], [name_u]Winter[/name_u], etc.
[name_f]Gwendolyn[/name_f] [name_f]Frances[/name_f] also sounds lovely. And [name_f]Gwendolyn[/name_f] has a lot of versatility with [name_f]Wendy[/name_f], [name_f]Gwen[/name_f], [name_f]Dolly[/name_f], [name_u]Lyn[/name_u], etc.