Isabella of Lusignan her half-brother King Henry III in 1254. After thirteen years of marriage Geoffery died. Isabella herself died on 14 January 1300 having most likely outlived all of her children. She had several grandchildren. Isabella also outlived all of her siblings (full and half). Isabella of Lusignan Isabella of Lusignan (c.1224 – 14 January 1300) was a daughter of Hugh X of Lusignan and his wife Isabella of Angoulême, Dowager Queen of England. Isabella was half-sister to King Henry III of England. She was Dame de Beauvoir-sur Mer et de Mercillac. Isabella's year of birth is unknown. She is mentioned in
Isabella of France, Dauphine of Viennois of Burgundy. In 1316, her father became the King of France. The same year, her marriage with Guigues VIII of Viennois was contracted. In 1322, however, her young father died, which devastated the family. Although Isabella was still in grief, she was married in 1323, when she was just 11 years old. Guigues was killed while besieging the Savoyard castle of Perrière in 1333. He left the Dauphiné to his brother Humbert II. He was buried in Saint-André in Grenoble. In 1335, Isabella married John III, Lord of Faucogney. She was widowed a second a time as John died in