Henry, Count of Nassau, Lord of Overkirk (Dutch: Hendrik van Nassau-Ouwerkerk, French: Henry de Nassau d'Auverquerque) (1640 – 18 October 1708) was a Dutch military general and second cousin of King William III of England and his Master of the Horse. Lord of Ouwerkerk and Woudenberg in the Netherlands, he was called by the English "Lord Overkirk" or "Count Overkirk". Life Born in The Hague to Louis of Nassau-Beverweerd (illegitimate son of Maurice of Nassau, Prince of Orange) and his wife Isabella van Hoorn, Overkirk was baptised there on 16 December 1640. Granted the title Count of Nassau (graaf van Nassau) by the Emperor Leopold I in 1679, he joined William III's invasion of England in 1688, and was appointed the king's Master of the Horse the following year. He resided in London, notably at Overkirk House, which later became part of 10 Downing Street. Overkirk died on 18 October 1708 at Roeselare in modern-day Belgium and is buried the Nassau-LaLecq Crypt at Ouderkerk aan den IJssel, Netherlands. His widow continued to live at Overkirk House until her own death in 1720. Military career Already in his youth, Overkirk entered military service. He first took part in the Franco-Dutch War and was wounded in the Battle of Seneffe. Some time later, he saved William III's life in the Battle of Saint-Denis. Prince William, who himself was fighting in the thick of the action, was so close to the enemy that the knight d'Esclainvilliers was already putting a gun to his chest when Ouwerkerk shot the Frenchman out of his saddle. This act was gratefully acknowledged by the States-General, with the gift of an honour guard, magnificent pistols and golden ornaments. William immediately made him a captain, and since then he accompanied William on most of his campaigns. In 1688 at the start of the Nine Years' War he accompanied William III during his invasion of England. He would take part in the Williamite War in Ireland and fight at the Battle of the Boyne. Back on the continent, he chased of the French cavalry at the Battle of Leuze. In 1692 he fought the French in the Battle of Steenkerque. The next year Overkirk achieved great fame as colonel of the Dutch bodyguard at the Battle of Landen, where he overran two French squadrons, passed through a third and obtained some standards and prisoners. In 1695 he served under the