The House of Blois was a prominent noble family in medieval France, originating from the region of Blois. It played a significant role in the political landscape of the time, producing several influential counts and dukes. The family was known for its connections to the French crown and its involvement in various conflicts, including the Hundred Years' War. Members of the House of Blois often intermarried with other noble families, strengthening their political alliances. Notable figures include Thibaut IV, who became King of Navarre, and Louis I, who was a key player in the power struggles of the 12th century. The family's legacy is marked by its contributions to the history of France.