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I love [name_f]Cecily[/name_f] or [name_f]Eloise[/name_f] with your daughters’ names.
I would nix [name_f]Tess[/name_f]. It isnt as feminine as the other names.
[name_f]Cecily[/name_f]–I have never warmed to this name, but I can see the appeal. I prefer [name_f]Cecelia[/name_f] myself, especially when paired with [name_f]Lilla[/name_f] and [name_f]Vivienne[/name_f] (GREAT choices, by the way!)
[name_f]Eloise[/name_f]–This is possibly one of my favorites. I think it is so soft and sweet. With [name_f]Lilla[/name_f] and [name_f]Vivienne[/name_f] I think it works very, very well. [name_f]Lilla[/name_f], [name_f]Vivienne[/name_f], [name_f]Eloise[/name_f].
[name_f]Felicity[/name_f]–I like this one as well. This name is slowly growing on me. I feel it can work well with your other names.
[name_f]Rosalie[/name_f]–This is also a great choice. I get the same feeling from [name_f]Rosalie[/name_f] as I do [name_f]Eloise[/name_f]: very soft, sweet, and feminine.
[name_f]Tess[/name_f]–I like this name least. It just doesn’t do anything for me, and paired with the other two names, it’s just not as great.
My favorites with [name_f]Lilla[/name_f] and [name_f]Vivienne[/name_f] are…
[name_f]Felicity[/name_f]
[name_f]Eloise[/name_f]
[name_f]Rosalie[/name_f]
They all have beautiful sounds. As a bonus, I love the meaning of [name_f]Felicity[/name_f] and the masculine [name_m]Felix[/name_m].
The only one I don’t like is [name_f]Felicity[/name_f]. It seems really dated to me. I think [name_f]Cecily[/name_f] and [name_f]Eloise[/name_f] would sound perfect with [name_f]Lilla[/name_f] and [name_f]Vivienne[/name_f].
I don’t like that [name_f]Cicily[/name_f] and [name_f]Lilla[/name_f] both have the “il” in there. [name_f]Tess[/name_f] seems a bit abrupt next to [name_f]Vivienne[/name_f] and [name_f]Lilla[/name_f]. [name_f]Eloise[/name_f], [name_f]Felicity[/name_f] or [name_f]Rosalie[/name_f] are great options!
[name_f]Lilla[/name_f] - it’s been one of my favorites for a while. [name_m]Beau[/name_m]-ti-ful
From your list, I like [name_f]Eloise[/name_f] best with [name_f]Lilla[/name_f] and [name_f]Vivienne[/name_f] and agree that [name_f]Tess[/name_f] doesn’t really fit. With [name_f]Lilla[/name_f], I would stay away from names ending in -[name_f]LIA[/name_f] because they are so similar in sound. Some other possibilities:
[name_f]Lilla[/name_f], [name_f]Vivienne[/name_f], and
[name_f]Beatrix[/name_f]
[name_f]Clover[/name_f]
[name_f]Daphne[/name_f]
[name_f]Elodie[/name_f]
[name_f]Esme[/name_f]
[name_f]Flora[/name_f]
[name_f]Phoebe[/name_f]
[name_f]Rose[/name_f]
[name_f]Tabitha[/name_f]
[name_f]Violet[/name_f]
[name_f]Thais[/name_f]
[name_f]Zara[/name_f]
[name_f]Zoe[/name_f]
I have always worried that [name_f]Eloise[/name_f] is a bit to whimsical with [name_f]Lilla[/name_f] and [name_f]Vivienne[/name_f] and that it sounds better with names like [name_f]Matilda[/name_f], [name_f]Penelope[/name_f], [name_f]Beatrix[/name_f] and such. We are drawn to it for other reasons obviously but I’m still not sure about it.
[name_f]Tess[/name_f] is the odd one out but for some reason we keep adding it back on the list. [name_f]Lilla[/name_f], [name_f]Vivi[/name_f] and [name_f]Tess[/name_f] are pretty cute [name_f]IMO[/name_f]. [name_f]Tess[/name_f] seems a bit wilder but still romantic in my mind.
[name_f]Cecily[/name_f] and [name_f]Rosalie[/name_f] have been the top 2 contenders for a while and we still love them.
[name_f]Felicity[/name_f] is a newer love, DH is still a bit unsure about it as well. We like the uncommonness of it as well as the 3 syllables and the ee ending. It is very light which I love and the meaning is just a bonus.
We could see us using [name_f]Rose[/name_f] as a 4th girl with [name_f]Cecily[/name_f], [name_f]Eloise[/name_f] and [name_f]Felicity[/name_f]
I admit that [name_f]Tess[/name_f] is the odd one out but that makes it seem like the one that fits best to me because all of your other ideas seem to fit with [name_f]Vivienne[/name_f] more than [name_f]Lilla[/name_f], whereas [name_f]Tess[/name_f] is not like either.
Similar…
[name_f]Sabine[/name_f]/[name_f]Sabina[/name_f]
[name_f]Justine[/name_f]/[name_f]Justina[/name_f]
[name_f]Naomi[/name_f]
[name_f]Rosetta[/name_f]
[name_f]Phoebe[/name_f]
[name_f]Daphne[/name_f]
[name_f]Amabel[/name_f]
[name_f]Maeve[/name_f]
[name_f]Allegra[/name_f]
[name_f]Olive[/name_f]
[name_f]Esme[/name_f]
My faves are [name_f]Cecily[/name_f], [name_f]Rosalie[/name_f] and [name_f]Eloise[/name_f]. I would pick [name_f]Cecily[/name_f].
We hope to have 4 children so we planned on using one long name and one short name like we have done with Lilla and Vivienne. So whatever we pick with for a 3 child will be off balance one way or the other. DH and I have said that Tess has a bit more finality then the other names, which is why it works so well in the set of 3.
Your daughters have beautiful names! My favorites of your options are [name_f]Cecily[/name_f] and [name_f]Rosalie[/name_f]. I think they compliment your girls’ names well and meet your criteria!
I love [name_f]Tess[/name_f] I like that it’s short and I think it’s perfect for the youngest sister it’s super cute!! My oldest is [name_f]Summer[/name_f] my second is gianna which we shorten to [name_f]Gigi[/name_f] and my next if a girl will be [name_f]Mia[/name_f] or [name_m]Jovi[/name_m].
[name_m]Even[/name_m] [name_f]Tessa[/name_f] is really pretty 
I would choose [name_f]Cecily[/name_f] or [name_f]Eloise[/name_f], [name_f]Felicity[/name_f] fits nicely as well, too. I would nix [name_f]Rosalie[/name_f] and [name_f]Tess[/name_f], since you would like to use just [name_f]Rose[/name_f] in the future.
Bump for evening crowd