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, Countess of Lennox Albany, who was the second son of King Robert II by his first wife Elizabeth Mure of Rowallan, and who was to a certain extent the "de facto" ruler of Scotland, at points during the reigns of his father and elder brother. In 1392, Duncan agreed to marry Isabella to Robert's son, Murdoch Stewart. Murdoch and Isabella did marry, and had at least five children: Disaster struck Isabella's family when her husband, father, and sons Walter and Alasdair were tried for treason after her other son, James the Fat, raised a rebellion against the king, marched on Dumbarton, burned it,