I like Sisi a lot. I find that as silly as it may be, it is actually a really natural one that comes off the tongue really easily. I work in childcare and so many kids call me Sisi because that is what they get from
Elise. I guess thats why Sisi was used as a lesser nn for
Elisabeth as well.
Of your list, I think it would be a gorgeous nn for
Thomasina,
Serafina, Alisandra and
Melisande. I also am really liking Verissimia...