Henry of Nassau-Dillenburg

Henry of Nassau, count of Nassau-Dillenburg, (Dillenburg 15 October 1550 — Mook 14 april 1574) was the youngest brother of William the Silent (William I of Orange).

He was the twelfth and last child of William the Rich  and Juliana of Stolberg-Wernigerode, and was raised a Lutheran. He studied in Louvain and Strasbourg. He and his brothers William and Louis joined the Huguenot army of the Prince of Condé and took part in the battle of Montcontour (3 October 1569). Henry fell in the battle of the Mookerheyde at the age of twenty-three together with his elder brother Louis. Their bodies have never been recovered.

Reference
Article in Grote Winkler Prins, Encyclopedie in twintig delen, 7th edition, Elsevier, Amsterdam (1972).