There was a time when most all names had a meaning. For example, if one traces my own name, Geoffrey, one goes back to the Germanic Gottfried, or "God's peace." Nowadays, how many of us actually relate our names to a character trait, a place, etc?

As for Shanks' reminding us that "Goodbye" meant "God be with ye," might not "hello" be derived from "hallow?" Some languages do invoke a diety, or a supposedly deific trait, in greeting. Conjecture, of course, but why not?