Wilhelm von Perponcher-Sedlnitzky

Count Wilhelm Heinrich Ludwig Arend von Perponcher-Sedlnitzky (17 July 1819 – 24 June 1893) was a Dutch-German diplomat.

[1] He was the eldest son of Count Hendrik George de Perponcher Sedlnitsky (1771–1856), a Dutch general and diplomat, and Countess Wilhelmina Frederika Adelaide van Reede Ginkel.

[6] His paternal grandparents were Baron Cornelis de Perponcher Sedlnitsky, (scion of an old Huguenot Dutch family and of old Czech noble family that had fled Bohemia after the 1621 Battle of White Mountain), a justice in the Hof van Holland (the high court of the province of Holland), and Jonkvrouwe Johanna Maria van Tuyll van Serooskerke.

On 5 June 1869, King William III of the Netherlands appointed him Grand Cross of the Order of the Oak Crown.

[1] Through his daughter Elisabeth, he was a grandfather of Prince Gebhard Blücher von Wahlstatt (1865–1931), who married diarist Evelyn Stapleton-Bretherton in 1907.