Which do you prefer?
Siblings would be [name_f]Violet[/name_f] ([name_f]Letty[/name_f]) and [name_f]Florence[/name_f] ([name_f]Flora[/name_f]) [name_f]Lucia[/name_f] would be pronounced either [name_u]Lou[/name_u]-Chee-[name_m]Ah[/name_m] or [name_u]Lou[/name_u]-See-[name_m]Ah[/name_m]. I’m just not a fan of the [name_u]Lou[/name_u]-Sha pronunciation.
Lucille seems more like your other slightly quirky, vintage picks. You also avoid pronunciation issues. That being said, I do love [name_f]Lucia[/name_f]!
I prefer [name_f]Lucille[/name_f]! Less pronunciations and fits well with your set
How about [name_f]Lucille[/name_f] nn [name_f]Lucia[/name_f]?
I don’t like [name_f]Lucille[/name_f] due to a very bad experience, but if you like go ahead
However, I really like [name_f]Lucia[/name_f]
Lucille most definitely! [name_f]Lucille[/name_f] is very elegant and matches lovely with your other girl names. [name_f]Lucia[/name_f] is nice but the pronounciation really does vary and I think you would be forever correcting people.
Thanks guys. [name_f]My[/name_f] husband doesn’t love [name_f]Lucille[/name_f] as much and I think not liking a pronunciation of [name_f]Lucia[/name_f] will become a bit grating if used by others. We’ve decided to keep both as middle name options 
Lucia seems too dramatic to be paired with [name_f]Letty[/name_f] and [name_f]Flora[/name_f].
I like [name_f]Lucy[/name_f], [name_f]Lettie[/name_f], and [name_f]Flora[/name_f], so I would go with [name_f]Lucille[/name_f] or [name_f]Lucilla[/name_f] or [name_f]Lucinda[/name_f] or [name_f]Lucasta[/name_f].
I like [name_f]Lucille[/name_f] a little better. It fits with your girls’ names.