Conrad of Antioch (Italian: Corrado d'Antiochia; born 1240/41, died after 1312) was a scion of an illegitimate branch of the imperial Staufer dynasty and a nobleman of the Kingdom of Sicily. He was the eldest son of Frederick of Antioch, imperial vicar of Tuscany, and Margherita di Poli. He was thus a grandson of the Emperor Frederick II (reigned 1220–50), a nephew of King Manfred of Sicily (1258–66) and cousin of King Conradin (1266–68). His surname, which is contemporary, comes from his paternal grandmother, a mistress of Frederick II from Antioch. He may be called "Conrad I" to distinguish him from his descendants with the same given name.