...Sir Thomas Knyvett of Buckenham, Norfolk (c. 1485 – 10 August 1512) who married Muriel Howard (d.1512), the widow of John Grey, 2nd Viscount Lisle, by whom she was the mother of Elizabeth Grey, Viscountess Lisle, who was at one time betrothed to Charles Brandon, 1st Duke of Suffolk and was the wife of Henry Courtenay.
Muriel Howard was the daughter of Thomas Howard, 2nd Duke of Norfolk, and Elizabeth Tilney.
Children of Sir Thomas Knyvett and Muriel Howard, who through their mother were all first cousins to Queen Anne Boleyn and Queen Katherine Howard ...