Gender Feminine Usage Greek Mythology Scripts Σαώ(Ancient Greek) Pronounced Pron. /sa.ɔ̌ː/(Classical Greek) /ˈseɪ.oʊ/(English) Meaning & History Derived from Greek σῶς (sos) meaning "whole, unwounded, safe". This was the name of one of the Nereids in Greek mythology. A small moon of Neptune is named for her.