My name(Stephens) seems to be so old it's just a name, nobody can remember what it means.It is an incredibly common in Cornwall(the land of my fathers. And indeed mothers). There is a rugby team in St Ives consisting entirely of people called Stephens.
   I believe Gregory means "watcher" or "sentry" or somethng in some old language or other.
Bill D(ay): you Americans so love all that Celtic stuff. Where I come from, Day is just that sort of period of time from the first cup of tea till the first pint of bitter.