σωφρων is just 'wise', and there are a lot of names ending in -κρατης (Iphikrates and Hippokrates, off the top of my head). -της as a noun suffix is often similar to -er/-or in English, but I wonder whether -κρατης is not just a corruption or archaic form of κρατος, since σως is whole, safe, intact etc.
Maybe one could go with what Apollo said of Socrates- according to Socrates, in his own trial, likely uttered so as to spite the judges even more


And a savior is literally one who maintains something safe- or even whole in some contexts.