[name_f]Adelaide[/name_f]
[name_f][/name_f][name_f]Violaine[/name_f]
[name_f][/name_f][name_f]Calpurnia[/name_f]
They all have important significance for me. I am mostly torn between the first two. Also considering a [name_f][/name_f] variant of [name_f]Violaine[/name_f] (Violetta), [name_f]Zelia[/name_f], [name_f]Edda[/name_f] and [name_f]Apolline[/name_f]. All the names are read with Italian pronounciation besides [name_f]Violaine[/name_f] and [name_f]Apolline[/name_f]
Oh I do love [name_f]Adelaide[/name_f]! [name_f]Calpurnia[/name_f] is stunning too. They are decently different (style wise). I think I might prefer [name_f]Calpurnia[/name_f], but every name you mentioned is quite pretty. [name_f]Do[/name_f] any of them resonate with or feel particularly you[name_f][/name_f]?
From my experience unfortunately no one can yell you what name is best for yourself except… yourself! 
Some things to maybe make it a bit easier…
[name_f][/name_f]a) From my experience, as lovely as some foreign names are it’s better to choose one that works more naturally in the language of the country you live in. For me I feel more authentic that way? So I’d personally not do [name_f]Violaine[/name_f] or [name_f]Apolline[/name_f]
[name_f][/name_f]b) How do you feel about nicknames? I would expect [name_f]Adelaide[/name_f] and [name_f]Calpurnia[/name_f] to be frequently nicknamed, [name_f]Violetta[/name_f] and [name_f]Zelia[/name_f] sometimes, and [name_f]Edda[/name_f] rarely since it’s the shortest. So, for instance, if you dislike Adelaide’s most intuitive nicknames I’d choose something else, or if you love[name_f][/name_f] nicknames and really want one then I would avoid [name_f]Edda[/name_f].
I like [name_f]Violaine[/name_f] the most
In [name_f]Italy[/name_f], [name_f]Adelaide[/name_f] will be nicknamed maybe [name_f]Adele[/name_f] or [name_f]Ada[/name_f]. I like it.
[name_f][/name_f][name_f]Calpurnia[/name_f] [name_f][/name_f]- [name_m]Cal[/name_m]? [name_f]Callie[/name_f]? Fine for me, but not falling in love.
[name_f][/name_f]Vio is okay. I don’t like the nickname [name_f]Viola[/name_f].
[name_f][/name_f][name_f]Apolline[/name_f] doesn’t have that problems of pronouncing surprisely for what I have tested. [name_f]Violaine[/name_f] does, people read as Violine, or read it correctly, depending on the luck
[name_f]Love[/name_f] [name_f]Violaine[/name_f] for you!