John Csák

John from the kindred Csák (Hungarian: Csák nembeli János; died before 1324) was a Hungarian baron at the turn of the 13th and 14th centuries. He served as Master of the horse in the 1290s. Following the extinction of the Árpád dynasty, he initially supported pretender Wenceslaus, but later joined the allegiance of Charles I. He was made Judge royal in 1311, putting end to a more than ten years of vacancy. He betrayed the King and joined his distant relative, the rebellious oligarch Matthew Csák in 1314.