Isabel married Speaker of the House of Commons, Chancellor of the Duchy of Lancaster Sir William Tresham in 1434 in Northamptonshire, England. Sir (son of Sir Thomas Tresham and Lady Filia Rempston) was born in 1390 in Sywell, Northamptonshire, England; died on 22 Sep 1450 in Northamptonshire, England. [Group Sheet] [Family Chart]

1. High Sheriff of Cambridgeshire and Huntingdonshire, Speaker of the House of Commons Sir Thomas Tresham was born in 1420 in Harringworth, Northamptonshire, England; died on 6 May 1471 in Sywell, Northamptonshire, England.