Who married Joan Verdon?

Walter Devereux, 8th Baron Ferrers of Chartley (c. 1432 – 22 August 1485) was an English nobleman and a loyal supporter of the House of York during the Wars of the Roses. He was a member of the inner circle of King Edward IV, and died fighting for Edward's younger brother, King Richard III, at the Battle of Bosworth in 1485.