This is a post which I originally wrote a few months ago as a guest post on my lovely friend Sarah’s history blog, which is now sadly defunct, though she writes one about Edward II’s grandfather Henry III instead, yay.Isabella of France, queen consort of England, lady of Ireland, duchess of Aquitaine, countess of Chester and Ponthieu, had a remarkably illustrious lineage: she was the daughter of Philip IV, king of France and of Joan, queen of Navarre and countess of Brie, Bigorre and Champagne in her own right. Isabella was the sixth of Philip and Joan’s seven children. Her three older brothers all reigned as kings of France, Louis X, Philip V and Charles IV, her younger brother Robert died in 1308 aged about eleven, and she also had two older sisters, Marguerite and Blanche, who both died in early childhood in or shortly after 1294. Her paternal grandmother Isabel, queen of Philip III of France, after whom she was presumably named, was the daughter of King Jaime I ‘el Conquistador’ of Aragon and the granddaughter of King Andras II of Hungary; via the Hungarian line, Isabella of France was the seven greats granddaughter of Harold Godwinson, the king of England killed at Hastings in 1066. She and her husband Edward II were related: her great-grandmother Marguerite of Provence, queen of France was the older sister of Edward’s paternal grandmother Eleanor of Provence, queen of England. They were also related rather more distantly via the Castilian royal family, Edward’s great-grandmother Berenguela, queen of Castile and Leon, being the sister of Isabella’s great-great-grandmother Blanche of Castile, queen of France.