Marie de Saint-Clair b abt 1192 was said-to-be descended from Henry de Saint-Clair, Baron of Roslin in Scotland, who accompanied Godfroi de Boullion on the First Crusade. Marie's grandmother married into the French Chaumont family - as did Jean de Gisors. Marie may have been the second wife of Jean de Gisors. She is rumored to have been the second grand master of the Priory of Sion.
