Jean de Ronay (died 11 February 1250, Mansurah, Egypt) was knight of the Order of Saint John of Jerusalem who was appointed Grand Commander of the Knights Hospitaller by the Grand Master Guillaume de Chateauneuf in 1243 or 1244.[1] He served as interim Grand Master of the Knights Hospitaller from 1244 to 1250 during the captivity of de Chateauneuf.[2] He died in battle during the Seventh Crusade.[3]