The Montlhéry noble house was related to the Montmorency family; Thibaud, the founder of the Montlhéry dynasty, was the brother of Bouchard II, the progenitor of the Montmorency house.
Kediaman bangsawan Montlhéry berhubungan dengan keluarga Montmorency; Thibaud, pendiri dinasti Montlhéry, adalah saudara Bouchard II, pewaris kediaman Montmorency.