Adolph of Cleves, Lord of Ravenstein (1425–1492) was the youngest son of Adolph I, Duke of Cleves and of his wife Marie of Burgundy, a sister of Philip the Good, Duke of Burgundy.
The Duke Philip the Good of Burgundy and his wife, Isabel of Portugal, decided to marry their nephews, and Adolph became engaged to infanta Beatrice of Coimbra, daughter of Pedro, Duke of Coimbra.
Beatrice had taken refuge in Burgundy, under her aunt’s protection, following his father's army defeat in the Portuguese civil war.
Adolph and Beatrice were married in 13 May 1453 and they had two children:
Following Beatrice's death, Adolph married his cousin Anne of Burgundy (a natural daughter of duke Philip the Good).