Constanza married John Gaunt PLANTAGENET on 21 Sep 1371 in Roquefort, Landes, Aquitaine, France. John (son of Edward Iii PLANTAGENET and Philippa of HAINAULT) was born on 14 Mar 1340 in Abbaye De St Bavon, Ghent, Flandre Orientale, Belgium; died on 04 Feb 1399 in Leicester Castle, Leics, Land, England. [Group Sheet] [Family Chart]