[name_m]Hi[/name_m] there.
Your kids’ names are lovely!
Here are my thoughts on the names that you’re considering:
Cecily-It’s so pretty & friendly & unique. I agree that it could be a little tricky to say correctly if you’re not familiar with it. And that could get annoying.
Ainsley-Now, I think that this name is awkward to say. It just doesn’t flow right to me. But if you like it & you & your husband are okay w/the friend association, it’s probably not a big deal.
Catherine-Catherine nn [name_f]Cate[/name_f] is polished & classic. And I’m w/you; I love Cate, but not Katie. And I fear it would be at least occasionally unavoidable. I think that the nn [name_f]Cece[/name_f] is okay though. Especially if you gave her a ‘C’ mn. [name_f]Catherine[/name_f] Cecily!
Margot-I like it okay, & it goes well w/your crew. I hear it way too often though, so it doesn’t sparkle much.
Annie-So sweet & old fashioned but fresh. I definitely prefer it as a nn. Maybe you can talk your husband into Anne, Annabelle, Annabella, Annelise, [name_f]Annika[/name_f] or [name_f]Susanna[/name_f] nn Annie.
Margaret-Good solid name, but definitely hard to shake a mean girl association.
Jane-A nice classic, but I don’t think that two 'J’s usually sound great. Sometimes alliteration is fine depending on the letter, but for some reason two Js are over kill.
Here are a few more ides that you may like:
[name_f]Alice[/name_f]
[name_f]Audrey[/name_f]
[name_f]Audra[/name_f]
[name_f]Beatrice[/name_f]
[name_f]Beatrix[/name_f]
[name_f]Cecilia[/name_f]
[name_f]Celia[/name_f]
[name_f]Daisy[/name_f]
[name_f]Daphne[/name_f]
[name_f]Delia[/name_f]
[name_f]Dahlia[/name_f]
[name_f]Eleanor[/name_f]
[name_f]Frances[/name_f]
[name_f]Freya[/name_f]
[name_f]Flora[/name_f]
[name_f]Felicity[/name_f]
[name_f]Greta[/name_f]
[name_f]Gemma[/name_f]
[name_f]Georgia[/name_f]
[name_f]Hattie[/name_f]
[name_f]Hazel[/name_f]
[name_f]Maren[/name_f]
[name_u]Marian[/name_u]
[name_f]Matilda[/name_f]
[name_f]Nora[/name_f]
[name_f]Olive[/name_f]
[name_f]Phoebe[/name_f]
[name_f]Penelope[/name_f]
[name_f]Pearl[/name_f]
[name_f]Rose[/name_f]
[name_f]Ruth[/name_f]
[name_f]Rosalie[/name_f]
[name_f]Stella[/name_f]
[name_f]Sylvia[/name_f]
[name_f]Thea[/name_f]
[name_f]Violet[/name_f]
[name_u]Vida[/name_u]
[name_f]Willa[/name_f]
[name_f]Hope[/name_f] this helps. 
