Richard of Cornwall Plantaganet, Earl of Cornwall, King of Romans and Almiane (Germany), 1256. He was born January 5, 1209, youngest son of King John. He was made Earl of Cornwall and Count of Poictou, 1225. He refused the Empire in 1250.
He married (1) Isabel Marshal, daughter of William Marshal, Earl of Pembroke, and widow of Gilbert de Clare, Earl of Gloucester. He died in 1272.
He married (2) Sanchia, 3rd daughter and co-heir of Raymond Berenger V., Count of Provence and his wife, Beatrix of Savoy. Sanchia was the sister of Queen of England, Eleanor of Provence, wife of Henry III., the sister of the Queen of France, Margaret of Provence, wife of Louis IX., and the sister of Beatrice, wife of Charles of Anjou, who was the brother of Louis IX.
("The Genealogy of Homer Beers James", V1, JANDA Consultants, c 1993 Homer James)