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Male Guillaume III (I) De+ Bethune Click to view Guillaume III (I) De+ Bethune in the family tree

Guillaume III (I) De+ was born about 1184 in Meulebeke, Flandre-Ouest, Belgium.  Guillaume III (I) De+'s father was Guillaume II De+ Bethune and his mother was Mahaut+ Tenremonde.  His paternal grandparents were Robert V De+ Bethune and Adelaide De+ Saint Pol; his maternal grandfather was Gauthier III De+ Tenremond and his maternal grandmother is Alix De+ Molembeque-Rosoy. He had a brother named Robert VII De+.  He was the older of the two children.  He died on August 24th, 1243 in Lokeren, Flandre-Orientale, Belgium.


Guillaume III (I) De+'s first family with Isabelle De+ Pontrohart

They had two daughters named Mahaut De+ and Mathilde De+.


Guillaume III (I) De+'s second family with Elizabeth De Roesbrugge

They had a son named Guillaume II De.


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