The House of Châtillon was a noble family in medieval France, known for its influence and power. Originating in the 10th century, the family played a significant role in the politics of the region, particularly in Champagne and Burgundy. They were involved in various conflicts and alliances, often marrying into other prominent families to strengthen their position. Members of the House of Châtillon held important titles, including counts and dukes. One notable figure was Guy de Châtillon, who participated in the Crusades. The family's legacy is marked by their contributions to the feudal system and their impact on the history of France.