Question: Frederick of Pettorano, was the eldest illegitimate son of Frederick II, king of Sicily and Germany, 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 of England, was Holy Roman Empress, Queen of the Germans, and Queen consort of which location?
Sentence (from "Conrad of Antioch"): His surname, which is contemporary, comes from his paternal grandmother, a mistress of Frederick II, who was from Antioch.
Relevant evidence: No