Jan IV of Nassau
| John IV, Count of Nassau | |
|---|---|
| Spouse(s) | Maria of Loon-Heinsberg |
| Noble family | Nassau |
| Father | Engelbert I of Nassau |
| Mother | Johanna van Polanen |
| Born |
1 August 1410 Dillenburg |
| Died | 3 February 1475 (aged 64) Breda |
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:
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