John Heydon (died 1479)
…ousted John Mowbray, 3rd Duke of Norfolk, from his rightful position as the dominant magnate in East Anglia. Two of his agents in particular, Heydon and Sir Thomas Tuddenham, from 1443 jointly held the 'powerful and lucrative' stewardship of the Duchy of Lancaster, and are said to have terrorised East Anglian gentry, including…