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 Navarre, Countess of Armagnac (successor of their father), and Beatrice. Isabella was firstly betrothed to Infante John of Aragon around 1414. Her mother, Queen Eleanor bequeathed her money for the marriage. John later became King of Aragon but broke off his contract with Isabella, in hopes of marrying Joanna II of Naples. Isabella eventually married on 10 May 1419 John IV of Armagnac. This marriage was John's second marriage, after the death of his first wife Blanche of Brittany, who had left no sons. Isabella and John had five children: Isabella and her husband both died in 1450; she died in August and he