... Sir William married three times. ...
... His second marriage was to Lady Joan Stafford, daughter of Humphrey Stafford, 1st Duke of Buckingham and Lady Anne Neville, by whom he had issue. ...
... By his second wife, Lady Joan Stafford, Sir William Knyvett had three sons including along with three daughters: ...
- Sir Edward Knyvett ...
- Charles Knyvett ...
- John Knyvett ...
- Elizabeth ...
- Anne Knyvett ...