PoppaGator, you have to be BAPTISED with a saints name but thast doesn't mean a mother with a flair for twee sounding names can't choose something like Meadow. I grew up next to a girl who had a baby in college with her boyfriend and she named the kid Amber. (Yuk, eh?) Her parents, good Italian Catholics from Boston had the kid baptised Maria.
I was also baptised with a saints name (Elizabeth) because the Irish name I was given wasn't a saints name.
I guess it depends on your parish, the presiding priest and the godparents.