Thomas married Countess of Hainaut Jeanne Hainaut in 1237. Jeanne (daughter of 9th Count of Flanders Baldwin VI Hainaut and Mary Champagne) was born in 1199 in Nord, Nord-Pas-de-Calais, France; died on 5 Dec 1244 in Nord, Nord-Pas-de-Calais, France. [Group Sheet] [Family Chart]
