Initially
Sebastiana seems like a bit too much but I could see it growing on me.
Sebastienne is nice as well.
Since
Sebastiana is kinda frilly imo I think it would work better with a more "down to earth" mn:
Lily,
Ruth,
May,
Christine,
Gail,
Blythe, Bliss,
Carol.
“It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.”
~Mark Twain