I second [name]Isabel[/name]'s suggestion of [name]Marguerite[/name]! I’ve never liked the nn [name]Mamie[/name], it always makes me think of the Gone With the Wind character.
I don’t remember who mentioned naming her the same name my sister wanted, [name]Kaylee[/name] [name]Renee[/name]. I’ve talked to her and really didn’t feel that that name was right anymore.
She does like the idea of their initials being the same though. 
We have officially decided on [name]Margaret[/name]. [name]Charlie[/name] is excited because he likes [name]Maggie[/name], my husband like [name]Margo[/name], and I like both.
We like [name]Margaret[/name] [name]Lauren[/name] and [name]Margaret[/name] [name]Lucille[/name] for sure, just not sure what others there are.
We also like [name]Margaret[/name] [name]Lorelei[/name] but again, I do tend to bend the pronounciation to fit our last name. Does it sound right with [name]Blackwell[/name]?
[name]Margaret[/name] is lovely, and great with [name]Charles[/name] “[name]Charlie[/name]” and [name]Jasper[/name]. 
My favorites are [name]Margaret[/name] [name]Lucille[/name] and [name]Margaret[/name] [name]Lorelei[/name] (I think it’s fine with [name]Blackwell[/name]…), but I think that [name]Margaret[/name] [name]Lucille[/name] works a bit better with [name]Charles[/name] [name]Andrew[/name] and [name]Jasper[/name] [name]William[/name]. What about [name]Margaret[/name] [name]Louisa[/name]?
[name]Margaret[/name] [name]Leanne[/name] [name]Blackwell[/name]
[name]Margaret[/name] Lindley [name]Blackwell[/name]
[name]Margaret[/name] [name]Lenore[/name] [name]Blackwell[/name]
I also like [name]Margaret[/name] [name]Louisa[/name]
I think [name]Lorelei[/name] is a great MN
[name]Meredith[/name] [name]Lorelei[/name]
[name]Melissa[/name] [name]Lorelei[/name]
[name]Molly[/name] [name]Lorelei[/name]
[name]Magdalene[/name] [name]Lorelei[/name]
[name]Margaret[/name] [name]Lorelei[/name]
[name]Maeve[/name] [name]Lorelei[/name]
[name]Miranda[/name] [name]Lorelei[/name]
All if the names sound very English, as does [name]Blackwell[/name]. So I’d go with a nice British L middle name…
[name]Margaret[/name] [name]Leonie[/name] [name]Blackwell[/name]
I also like the feminine feel of [name]Larissa[/name] or [name]Lianna[/name] or Lenice.
[name]Margaret[/name], with the nn maggie or margo is a gorgeous name! congrats!
i love the suggestion of [name]Margaret[/name] [name]Louisa[/name], mainly cos im [name]Louisa[/name] [name]Margaret[/name] 
the two names sound great together, both vintage, classic and strong but then again i am biased!!
here’s just a few other suggestions, sorry for any repeats!
[name]Margaret[/name] [name]Lola[/name] [name]Blackwell[/name]
[name]Margaret[/name] [name]Lily[/name] [name]Blackwell[/name]
[name]Margaret[/name] [name]Lyra[/name] [name]Blackwell[/name]
[name]Margaret[/name] [name]Luca[/name] [name]Blackwell[/name]
[name]Lucille[/name] is easier to say than [name]Lorelai[/name].
I really love [name]Laurel[/name].
[name]Do[/name] you like [name]Margaret[/name] [name]Laurel[/name]? I think [name]Laurel[/name] is soft, sweet and feminine, a lovely match with [name]Margaret[/name].
All the best,
rollo
We have decided on [name]Margaret[/name] [name]Lorelei[/name] [name]Blackwell[/name] nn [name]Maggie[/name].
Any thoughts?
[name]Margaret[/name] [name]Lorelei[/name] [name]Blackwell[/name] was my favorite! What a beautiful name! She will love it!
P.S. She’s gonna be really happy you didn’t name her [name]Kaylee[/name] [name]Renee[/name].
i think [name]Mary[/name] [name]Logan[/name] would be adorable.
’
or
[name]Meridith[/name] [name]Lyndsay[/name]
I think [name]Margaret[/name] [name]Lorelai[/name] is absolutely gorgeous. The nickname [name]Maggie[/name] is wonderful.
[name]Charlie[/name], [name]Jasper[/name], and [name]Maggie[/name] sound great together
[name]Margaret[/name] [name]Lucille[/name] [name]Blackwell[/name] is my favorite!
[name]Mia[/name] [name]Luz[/name].