John I, Duke of Cleves Duke of Cleves and Count of Mark (1419-1481) (1419–1481) Parents Marie of Burgundy Adolph I Children Dietrich von der Mark-Kleve John II, Duke of Cleves Maria von der Mark-Kleve Adolf von der Mark-Kleve Edelherr von Büderich Philip of Cleves Engelbert, Count of Nevers Siblings Helen of Cleves Maria of Cleves Elisabeth of Cleves, Countess of Schwarzburg-Blankenburg Margaret of Cleves, Duchess of Bavaria-Munich Catherine of Cleves Agnes of Cleves Adolph of Cleves, Lord of Ravenstein Anna von der Mark-Kleve Engelbert von der Mark-Kleve Partners Elizabeth of Nevers
