Guillaume de Gisors
|
Guillaume de Gisors (1219-1307). Son of Hugues III de Gisors and grandson of Jean de Gisors. He was supposedly the thirteenth grand master of the Priory of Sion.
According to the genealogies in the "Prieuré" documents his sister married on Jean des Plantard and also state that Guillaume was inducted into the Order of the Ship and the Double Crescent in 1269. This order was created by Louis IX (Saint-Louis) for nobles who accompanied him on the ill-fated Sixth Crusade.