Otto de Grandson Italian knight (1238-1328), lord of the English Channel Islands (1238–1328) Parents Agnès von Neuenburg Peter de Grandson Children Agnes de Grandson Siblings Willelmeta von Grandson Henri III of Grandson William de Grandison, 1st Baron Grandison Gerard of Grandson Jacques de Grandson, Sire de Grandson Jordane de Grandson Partners Blanche di Savoia
