Authors:

A popular character in old Italian plays, who imitated with ludicrous incompetence the "buffone", or clown, and was therefore the ape of an ape; for the clown himself imitated the serious characters of the play.

Ambrose Bierce (2009). “The Devil's Dictionary: Easyread Large Bold Edition”, p.334, ReadHowYouWant.com
A popular character in old Italian plays, who imitated with ludicrous incompetence the buffone, or clown, and was therefore the ape of an ape; for the clown himself imitated the serious characters of the play.