He married thirdly Marguerite de Sully , daughter of William the Simple , Count of Sully , and his wife Agnes .
Henry first married Mathilde and secondly Hermentrude , both of unknown families .
Henry married thirdly Marguerite de Sully , daughter of William the Simple , Count of Sully , and Henry 's wife Agnes .
Henry first married Mathilde and secondly Hermentrude , both of unknown families .