Jacques de Grandson, Sire de Grandson Abt 1250/1258 - 31 Jul 1290/1297 (1252–1297) Parents Agnès von Neuenburg Peter de Grandson Children Peter II of Grandson Otto III of Grandson Siblings Henri III of Grandson Willelmeta von Grandson Gerard of Grandson William de Grandison, 1st Baron Grandison Otto de Grandson Jordane de Grandson Partners Béatrice de Neufchâtel