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
Æthelbald, King of Wessex at the Battle of Hingston Down, reducing Cornwall to the status of a client kingdom. He died in the following year and was succeeded by his son Æthelwulf, who appointed his eldest son Æthelstan as sub-king of Kent, Essex, Surrey and Sussex, in the same year. Æthelbald was the second son of King Æthelwulf and probably of his first wife Osburh, who was the mother of Alfred the Great. As Æthelstan was old enough to be appointed king ten years before Alfred was born in 849, and Æthelbald took part in battle in 851, some historians argue that it is