ljs_lj has a fic series where Dean and Sam are nephilim, and their angelic names are Ediniel and Samuriel. I'm fairly certain those names are invented, though. (And after Googling: Nope. Real-people names, at least according to Facebook. But somebody's Rule 34ed Sam/Uriel.) The series has been Jossed to hell and gone but I adore it to pieces anyway.

...huh. Samaqiel is apparently real: "Samaqiel is the angel of Capricorn and helps Archangel Anael look after people born under this sign."

If you're gonna make shit up, find a Hebrew dictionary. Mone'a-mimeni-la'asot-l'astmi-fadichot-bareshetiel (God is the one who keeps me from embarrassing myself on the internet).