HI, I have book written about Burton Agnes Hall. In this book they list the decendents as Sir Thomas d.1386 m.Margaret Speeton d.1409 Christopher d.1451 m.Elizabeth Conyers d.of Sir John Christopher m.Joan Strangeways known to be living between 1451-1475 Robert of East Heslerton d.1526 James of Wintringham Roger of Knapton m.Jenet Watson William of Knapton William of Knapton William 1605 and John1614 m.Ellen Pell Then the author goes on to say that the American branch were Probably the decendents of Christopher. The aurthor is a former guide at Burton Agnes Hall. Trudy