I suddenly think this ancient name (
https://en.wikipedia.org/wiki/Semiramis) is lustrous and eerily beautiful. Note that the pronunciation is on the second syllable. I'm sure some will cite the "semi" as a dealbreaker because of its phallic ties, but I'm not bothered by that. As for nicknames, I like Mimi, Miri, and Sissy.
Some combos:
Semiramis Roxana
Semiramis Olga
Semiramis Eulalie
Semiramis Irene
Semiramis Adele/Adela
Semiramis Leona
Semiramis Georgina
Semiramis Renata
Semiramis Odette
Semiramis Ophelia
Semiramis Daphne
Semiramis Agatha/Agata
Semiramis Fernanda
Semiramis Iona/Ione
Semiramis Delphine