Marie de St. Hilaire of Hainault

Marie de St. Hilaire was the partner of John of Gaunt, Duke of Lancaster.

Child of Marie de St. Hilaire and John of Gaunt, Duke of Lancaster

• Blanche Plantagenet b 1360, d. bt 1388 - 1389 who married Sir Thomas Morieux (1355–1387) in 1381, without issue.

Historical map of the County of Hainaut, with in red the current French-Belgian border. Via Wikipedia https://en.wikipedia.org/wiki/Hainaut_Province#/media/File:Carte_du... -- Public Domain.

Links:

• The Peerage
• John Gaunt
• The Province of Hainaut