Constance II of Sicily

Constance II (in Italian: Costanza; in Catalan: Constança; c. 1249 – (1302-04-09)9 April 1302) was queen regnant of Sicily from September 1282 to November 1285 alongside her husband, King Peter I. She was also queen consort of Aragon from 1276 to 1285. She was a pretender to the Kingdom of Sicily from 1268 to 1282. She was the only daughter of Manfred, King of Sicily, and his first wife, Beatrice of Savoy.

Source: Wikipedia — https://en.wikipedia.org/wiki/Constance_II_of_Sicily