Hugh of Montlhéry was a notable nobleman from the Île-de-France region in medieval France. He was born around the late 10th century and became the lord of Montlhéry, a strategic fortress near Paris. Hugh played a significant role in the feudal system, establishing his family's influence in the area. Hugh's lineage is important in the context of French nobility, as he was the ancestor of several prominent families. His descendants included notable figures such as Hugh I of France and Baldwin IV of Jerusalem, linking him to the broader history of European nobility and the Crusades.