I quite like
Silvana, so I would be tempted to use that. I also have a soft spot for Holly-Anna - which is slightly over the top by most standards.
In general I tend to veer away from feminine names that end in a, but if I went with
Silvana I think that
Giustina or
Giuditta would make a lovely sibling choice.
Yes, I would nickname in probably every case.
Silvana could be either Silvi or
Vana and I Would like it (Silvi and Ditta is kinda cool).
Holly-Anna might become Honna though, which I prefer as a full name as well.
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"How wonderful it is that no one need wait a single moment before starting to improve upon the world." -Ann FrankMama to my "bright star"
Clarisse Bituin and Wife to
Julius.
Mahal na mahal from our little family to yours!