Brewer's: Credat Judæus
or Credat Judæus Apella. Tell that to the Marines. That may do for Apella, but I don't believe a word of it. Who this Apella was, nobody knows. (Horace: 1 Satires, v. line 100.)
Cicero mentions a person of this name in Ad Atticum (12, ep. 19); but see Ducange.