Isabella II of Jerusalem

Isabella II (12124 May 1228), also known as Yolande of Brienne, was a princess of French origin, the daughter of Maria, the queen-regnant of Jerusalem, and her husband, John of Brienne. She was reigning Queen of Jerusalem from 1212 until her death in 1228. By marriage to Frederick II, Holy Roman Emperor, Isabella also became Holy Roman Empress and Queen of Sicily and Germany. Infant Queen Isabella II was born in Andria, in the southern Italian Kingdom of Sicily. She was the only child of Maria of Montferrat, Queen of Jerusalem, and John of Brienne. Maria was the daughter of Queen Isabella I of Jerusalem by her second husband Conrad I, and heiress, on her mother's death, of the Kingdom of Jerusalem. Maria died shortly after giving birth to Isabella II in 1212, possibly by puerperal fever. Because of this, Isabella II was proclaimed Queen of Jerusalem when she was only a few days old. Because her father John did not have a direct claim on the throne, he ruled as regent. Marriage with Frederick II