Ada de Montdidier was born circa 1050 to Hilduin IV de Montdidier (c998-c1063) and Alix de Roucy (c1010-1063) and died after 1121 of unspecified causes. She married Geoffroy de Guise (?-?) . She married Gauthier de Ath (?-?) . She married Thierry d'Avesnes (?-?) . Notable ancestors include Hugh Capet (c940-996), Charlemagne (747-814). Ancestors are from France, Germany, Belgium.


Offspring of Ada de Montdidier and Geoffroy de Guise (?-?)
Name Birth Death Joined with
Guy de Guise (?-aft1124)
Albert de Guise (?-?)

Offspring of Ada de Montdidier and Gauthier de Ath (?-?)
Name Birth Death Joined with
Ida de Ath (c1080-c1127) 1080 1127 Gossuin II de Mons
Guy de Chièvres

Beatrix de Ath (c1080-c1127) 1080 1127 Arnoul de Hainaut (c1093-aft1117)

Footnotes (including sources)

‡ General

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