John III, Duke of Cleves (Johann II. von Kleve-Jülich-Berg) (10 November 1490 - 6 February 1538/9) married Maria, daughter of William VIII of Jülich and Berg . (Maria was born 3 August 1491, and became heiress to her father's estates, Jülich, Berg and Ravensburg). Johann III became Duke of Cleves in 1521 and Lord of Ravenstein 1528.

Children:

• Sybille, married John Frederick, Elector of Saxony, head of the Protestant Confederation of Germany, "Champion of the Reformation".
• Anne of Cleves, who married Henry VIII, King of England, as his fourth wife.
• William III, Duke of Cleves, known as "William the Rich"
• Amelia, unmarried, died 1586