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].