Hello [name_f]Alice[/name_f]!
[name_f]Ivy[/name_f] - I immediately see the problem: [name_f]Ivy[/name_f] is absolute perfection, but that V last name is a tough call! The other names on your list are lovely, but [name_f]Ivy[/name_f] is that special mix of wearable classic and unique, nature-inspired gem. [name_m]How[/name_m] many syllables is your last name? [name_f]Ivy[/name_f] [name_m]Vaughn[/name_m] is a mouthful, but [name_f]Ivy[/name_f] [name_u]Valentine[/name_u] has enough surrounding sounds that it offsets the back to back Vs, at least to an extent.
[name_f]Isla[/name_f] - This is my favorite of your non-[name_f]Ivy[/name_f] options, but it’s definitely less familiar than [name_f]Emma[/name_f] and [name_u]Nick[/name_u]. I think you could get away with it, but that might be the farthest you’d want to stretch the stylistic difference.
[name_f]Charlotte[/name_f] - I love the soft elegance and gentle grace of this name. It has such a genteel Southern aura, and it’s classical enough to match perfectly with the timeless [name_f]Emma[/name_f] and the familiar [name_u]Nick[/name_u].
[name_f]Lily[/name_f] - I think this would be another good choice. Delicate, floral, and pretty, classic and familiar, but not common. A bit less substantial than [name_f]Emma[/name_f], but more unique than [name_u]Nick[/name_u].
[name_f]Olivia[/name_f] - Stylistically, this is a perfect fit with [name_f]Emma[/name_f] and [name_u]Nick[/name_u]. Its popularity is a bit of a turnoff for me, but seems to be a positive for you, given the familiarity of your children’s names. Nn [name_f]Olive[/name_f] would make this truly special, but [name_f]Liv[/name_f] is an ideal match for [name_u]Nick[/name_u]!
[name_f]Sophie[/name_f] - Personally, I would choose [name_f]Sophia[/name_f] and use [name_f]Sophie[/name_f] as the nn, but either way, this is another perfect match with your existing sibset. Classic but popular, and endlessly wearable.
Other suggestions:
[name_f]Eleanor[/name_f] nn [name_f]Elle[/name_f]/[name_f]Ellie[/name_f] or [name_f]Nell[/name_f]/[name_f]Nellie[/name_f]
[name_f]Jane[/name_f]
[name_f]Anna[/name_f]
[name_f]Katherine[/name_f] nn [name_f]Kate[/name_f]
[name_f]Isabel[/name_f]
[name_f]Violet[/name_f]
[name_f]Ada[/name_f]
[name_f]Claire[/name_f]
[name_f]Rose[/name_f]
[name_f]Lucy[/name_f]
[name_f]Ava[/name_f] - love this as a sister to [name_f]Emma[/name_f]!
[name_f]Grace[/name_f]
[name_f]Margaret[/name_f]
[name_f]Caroline[/name_f]
[name_f]Josephine[/name_f] nn [name_u]Jo[/name_u] or [name_u]Josie[/name_u]
[name_f]Audrey[/name_f]
[name_f]Leah[/name_f]
[name_f]Frances[/name_f]
[name_f]Laura[/name_f]
[name_u]June[/name_u]
[name_f]Ida[/name_f] - in lieu of [name_f]Ivy[/name_f]
[name_f]Holly[/name_f]
[name_f]Abigail[/name_f]
[name_f]Cora[/name_f]
[name_f]Julia[/name_f]
[name_f]Mary[/name_f]
[name_f]Lola[/name_f]
[name_f]Ellen[/name_f]
[name_f]Louisa[/name_f] nn [name_u]Lou[/name_u], [name_f]Lulu[/name_f], [name_f]Louise[/name_f]
[name_f]Ada[/name_f]
[name_f]Sarah[/name_f]
[name_f]Molly[/name_f]
[name_f]Hannah[/name_f]
[name_f]Zoe[/name_f]
[name_f]Nora[/name_f]
[name_f]Amelia[/name_f]
[name_f]Beth[/name_f]