Noble family Nassau Spouse Maria of Loon-Heinsberg Name Jan of | Mother Johanna van Polanen Father Engelbert I of Nassau | |
Born 1 August 1410Dillenburg (1410-08-01) Died February 3, 1475, Breda, Netherlands Children Johann V of Nassau-Vianden-Dietz Parents Engelbert I of Nassau, Johanna van Polanen Grandchildren William I, Count of Nassau-Dillenburg Grandparents John I, Count of Nassau-Dillenburg, John III, Lord of Polanen |

Count Jan (Johann) IV of Nassau (1 August 1410, Dillenburg – 3 February 1475, Breda) was Count of Nassau, Dietz and Dillenburg. He was the son of Engelbert I of Nassau, Count of Nassau and Dillenburg, Lord of Breda and Johanna van Polanen.
He married Maria of Loon-Heinsberg, Lady of Millen, Gangelt and Vucht (born in 1424), the daughter of John II of Loon, Lord of Jülich, Heinsberg and Löwenberg, on 7 February 1440. They had children, including:
References
Jan IV of Nassau Wikipedia(Text) CC BY-SA