Constance married John Of GAUNT in Sep 1371 in Roquefort, Guienne, or St. Andrew. John (son of Edward III King Of ENGLAND and Philippa Of HAINAULT) was born in Mar 1340 in St Bavon's Abbey, Ghent, Flanders; died on 03 Feb 1399 in Leicester Castle, England; was buried in St.Paul's Cathedral, London, England. [Group Sheet] [Family Chart]