Hugh III of Montlhéry was a notable nobleman in medieval France, born around 1150. He belonged to the House of Montlhéry, a prominent family in the Île-de-France region. Hugh III is best known for his role as the lord of Montlhéry, a fortified town near Paris, which played a significant part in the feudal system of the time. Hugh III was involved in various political and military activities, including alliances through marriage. He was the father of Hugh IV of Montlhéry, who continued the family's legacy. Hugh III's life reflects the complexities of noble power dynamics during the 12th century in France.