Frederick Henry, Prince of Orange. Frederick Henry was the sovereign prince of Orange and stadtholder of Holland, Zeeland, Utrecht, Guelders, Overijssel in the Dutch Republic from 1625 until his death in 1647.
   The last seven years of his life he also was the stadtholder of Groningen. As the leading soldier in the Dutch wars against Spain, his main achievement was the successful Siege of 's-Hertogenbosch in 1629.
   It was the main Spanish base and a well-fortified city protected by an experienced Spanish garrison and by formidable water defenses. His strategy was the successful neutralization of the threat of inundation of the area around 's-Hertogenbosch and his capture of the Spanish storehouse at Wesel.
   Frederick Henry was born on 29 January 1584 in Delft, Holland, Dutch Republic. He was the youngest child of William the Silent and Louise de Coligny.
   His father William was stadtholder of Holland, Zeeland, Utrecht, and Friesland. His mother Louise was daughter of the Huguenot leader Gaspard de Coligny, and was the fourth wife of his father. He was thus the half brother of his predecessor Maurice of Orange, deceased in 1625. Frederick Henry was born six months before his father's assassination on 10 July 1584. The boy was trained to arms by his elder brother Maurice, one of the finest generals of his age. After Maurice threatened to legitimize his illegitimate children if he did not marry, Frederick Henry married
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