John "Of Gaunt" of England Duke of Lancaster
John "Of Gaunt" of was born in March 1340 in Abbaye de St. Bavon,Ghent,Flandre-Orientale,Belgium.  He died at the age of 58 on February 3rd, 1399 in Leichester Castle,Leichestershire,England.  He was buried in St. Paul's,London,Middlesex,England.

 Marie de St. Hilaire Mistress
Marie was born about 1341 in of Hainault,(Belgium).  Marie is no longer alive.

 Blanche Plantagenet
Blanche was born about 1358 in of Hainault,(Belgium).