Nicknames:
San.
Famous people named Santos:
DJ Santos Pucello; singer Santos Colon.
Fun fact:
The Italian equivalent of this name is Santino.
More Inspiration:
Solid S Names For Baby Boys, Terrific Two-Syllable Boy Names,
A Spanish name meaning "saint," for when the you like the idea, but the actual name Saint is a little too Kardashian-West for your taste.