What nationality is the last name "Sao" from?

Question:

I guess all i know is that its an asian last name but i don't know where it comes from?

Additional Details

3 weeks ago
can anybody tell if its either japanese or chinese last name? because i didn't really think so

Best Answer - Chosen by Asker: 3 weeks ago
can anybody tell if its either japanese or chinese last name? because i didn't really think so