Yes, of course. Cassiel, Caphziel, Kasiel if you want to go back to Byzantine times. Angel of Saturn, mentioned in the Heptameron and Book of Honorius.

[He also totally doesn't believe you.]

That-- okay, yes, that it probably does. But it kind of kills the dramatic and vaguely threatening mood you seem to be going for. [That's not entirely true but Flynn will not admit he's intimidated by Lawrence of Arby's over here.]