Guy II the Red de Montlhéry (died 1108), son of Guy I, Seigneur de Montlhéry, and Hodierne de Gometz-la-Ferté. He held the titles of Count of Rochefort-en-Yvelines and Châtelain of Châteaufort and of Gometz, and was Seneschal of France under Philip I the Amorous, 1104-1106.
Guy joined with the Lombard contingent in the minor Crusade of 1101, later joining the army of Stephen of Blois.[1] He apparently rebelled against Louis VI, King of France (once his son-in-law), when he was killed.