Attention: Age at marriage (??-??-1336) below 16 years (13).
(1) She is married to Lodewijk I van Châtillon Graaf van Blois.
They got married in the year 1336, she was 13 years old.
Child(ren):
(2) She is married to Willem I (de Rijke) van Dampierre Graaf van Namen.
They got married in the year 1347, she was 24 years old.
Bron: http://nl.wikipedia.org/wiki/Johanna_van_Henegouwen
The data shown has no sources.