Background
He was born in Knaith, England, the son of William Willoughby and Elizabeth Hilyard.
He was born in Knaith, England, the son of William Willoughby and Elizabeth Hilyard.
Their daughter Frances Willoughby (died 1649) married Sir Bulstrode Whitelocke (1605–1675), Lord Keeper of the Great Seal, and was the mother of Sir William Whitelock.