My name's Alessandro, and it's very nice how many names you can get out of it. You could go with Alex or Ale (I've never heard a non-Italian using Ale, but that's how almost everyone calls me, and it's gender neutral). Or you can shorten it a little less, going with Alexia. Or Sandra! Almost nobody has ever used the second part of my name (Sandro tends to be an "indipendent" name). There's also "Sandrina" but I don't personally like it. If somebody were to call me "Sandrino" I'd think they were trying to make fun of me.

EDIT: Sorry, I didn't read the...