The Houses of Montlhéry and Le Puiset (referred to as the Montlhéry Clan by Riley-Smith[1]) is the name given by two powerful families, joined in marriage, that played a major role in the 11th and 12th centuries in both the Crusades as well as the administration of the Holy Land.
[2] The Montlhéry branch consists of the relatives (descendants and in-laws) of Guy I of Montlhéry (referred to here as simply Guy) and Hodierna of Gometz.
The Le Puiset branch consists of the descendants of Everard I of Breteuil.
Everard’s son Hugh I of Le Puiset (or simply Hugh) married Guy’s daughter Alice, bringing the families together.
The family trees of the Montlhéry and Le Puiset houses can be found in Riley-Smith.