well, despite what others are saying, I think it's a really beautiful names.
Sebastian is a lovely name for boys and this is a great variant for a girl. I would be more inclined to use it as a mn as in
Eleanor Sebastiana, but it would make a pretty first name as well. Hmmm combos:
Sebastiana EveSebastiana CecileSebastiana ClaireSebastiana NoelleSebastiana JuneSebastiana RoseSebastiana FayeSebastiana LarkSebastiana WrenSebastiana PearlSebastiana RuthSebastiana AliceSebastiana LouiseSebastiana Jane
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