Aimery I DE CHATELLERAULT , Viscount of Chatellerault

  General Notes:

https://en.wikipedia.org/wiki/Aimery_I,_Viscount_of_Ch%C3%A2tellerault

Dangereuse and Aimery were married for around seven years before she left her husband to become mistress to Duke William IX; this became an infamous liaison.

Aimery married Amauberge "Dangereuse" DE L'ISLE-BOUCHARD, daughter of Bartholomew DE L'ISLE-BOUCHARD and Gerberge DE BLAISON, before 1109. (Amauberge "Dangereuse" DE L'ISLE-BOUCHARD was born in 1079 and died in 1151.)