zany

Zanies have been theatrical buffoons since the heyday of the Italian commedia dell’arte, which introduced those knavish clowns. The Italian zanni was a stock servant character, often an intelligent and proud valet with abundant common sense, a love of practical jokes, and a tendency to be quarrelsome, cowardly, envious, vindictive, and treacherous. Zanni, the Italian name for the character, comes from a dialect nickname for Giovanni, the Italian form of John. The character quickly spread throughout European theater circles, inspiring such familiar characters as Pierrot and Harlequin, and by the late 1500s an anglicized version of the noun "zany" was introduced to English-speaking audiences by no less a playwright than William Shakespeare (in Loveas Labouras Lost).