Sir John Knyvet (1394/95 – 9 November 1445[1]), of Southwick, Northamptonshire, Hamerton, Huntingdonshire and Mendlesham, Suffolk, was an English MP.
[1] He was the son and heir of John Knyvet (1358/9–1418) by his first wife Joan Boutetout (d.c.1417), daughter and heiress of Sir John Boutetout (d. by 1377) of Mendlesham by his wife Katherine.
[1][2] By 1412 he had married Elizabeth (d.1441), daughter of Constantine, 2nd Lord Clifton (1372–95) of Buckenharn Castle, Norfolk by his wife Margaret, sister of Sir John Howard[1] and daughter of Sir Robert Howard (d.1389) of Wiggenhall and East Winch,[3] and heiress of her brother Sir John Clifton (d.s.p. 1447).
[1] His ancestral home of Southwick was inherited by his daughter, Joan, and her husband, John Lynne (d.1486/7).
[1] John Knyvet and Alice Lynne were the parents of Sir William Knyvett (d.1515).