Which third cousin of Henry VIII had a great-grandfather who had a deadly rivalry with Richard Plantagenet?
Eleanor Carey:  She was the great-granddaughter of Edmund Beaufort, 2nd Duke of Somerset, which meant she was a third cousin to Henry VIII. Edmund Beaufort, 2nd Duke of Somerset: Edmund Beaufort, 2nd Duke of Somerset, KG (1406 – 22 May 1455), sometimes styled 1st Duke of Somerset, was an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War.
i don't know