Frederick of Pettorano

Frederick of Pettorano was the eldest illegitimate son of Frederick II, Holy Roman Emperor. He was born in Sicily to an Italo-Norman noblewoman after his father's first marriage to Constance of Aragon. This mistress's name is unknown, but she came from a family of Norman counts in Sicily and had a relationship with the teenage Frederick between 1211 and 1212. Their relationship ended when King Frederick went to Germany and, in 1213, took up with another woman, a certain Adelaide. Besides Frederick of Pettorano, Frederick II probably named two other sons after himself: another illegitimate son, Frederick of Antioch, and a legitimate son by his wife Isabella. This last is known only by the initial "F." and died young.