(1) He is married to Mathilde Vrouwe van Béthune, Richebourg en Warnet.
They got married on February 2, 1246, he was 21 years old.
Child(ren):
(2) He is married to Isabelle van Luxemburg Markgravin van Namen.
They got married March 1265, he was 40 years old.
Child(ren):
Markgraaf van Namen (1263-1297); graaf van Vlaanderen (1278-1305); bisschop van Metz (1280); bisschop van Luik (1282).
comte de Flandre (23ste, 1278-1305), marquis de Namur (16de ,Guy I, 1265-1297), seigneur de Crévecoeur (8ste, 1272-1286), châtelain de Cambrai (12de, 1272-1305), châtelain de Bourbourg (11de, 1278-1279)
http://gw5.geneanet.org/index.php3?b=soudet2⟨=nl;pz=olivier;nz=soudet;ocz=0;p=guy;n=de+dampierre
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