Hi !!!
I find an hypotetical combo
Theodora and
Alexandra extremely beautiful, elegant and regal.
Alexandra became so plain that it could work only with few names in my opinion.
Theodora is one of these names as they share the Ancient Greek origin but also the regal history as
Theodora was the name of a lot of Byzanthine queens and princesses and
Alexandra is a classic among all European royal families.
So..don't worry!
It would be a great combo!