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 Portugal, Queen of Castile him arrested and tried. King John did as his wife asked, and the de Luna was executed. The death of his favourite saddened the king, and his health began to decline rapidly. On 15 November 1453, Isabella gave birth to a son, Alfonso, and nine months later, John came to his deathbed, expiring at last on 20 July 1454. Henry IV, newly divorced from Blanche, became king. After Henry ascended the throne, he sent his stepmother, who was three years younger than himself, and his two little half-siblings to the Castle of Arévalo. While there, the dowager queen and her