August von Senarclens de Grancy

German noble (1794–1871)

August Ludwig Freiherr von Senarclens Grancy (; 19 August 17943 October 1871) was the firstborn son of three sons and four daughters of César Auguste, Baron von Senarclens de Grancy, (born in 1763) and his wife Élisabeth Claudine Marie Rose de Loriol (born in 1773). Senarclens de Grancy is reputed to have been the long time lover of Wilhelmine of Baden, the Grand Duchess consort of Hesse, and the actual father by her of Empress Maria Alexandrovna of Russia and Prince Alexander of Hesse (who himself is an ancestor of modern royalty in Spain, the United Kingdom, and other European countries).

Senarclens de Grancy became the stable master of Louis II, Grand Duke of Hesse, a major general and a knight in the Order of Malta. It is also alleged that he was the biological father of four of the children of his employer's wife and, therefore, a likely ancestor of Felipe VI of Spain and Charles III of the United Kingdom. Senarclens de Grancy may also be a direct ancestor of several royal pretenders: Alexander, Crown Prince of Yugoslavia, Margareta of Romania and Georg Friedrich, Prince of Prussia. Senarclens de Grancy died in Jugenheim on 3 October 1871.

On 15 November 1836, Senarclens de Grancy married Luise Wilhelmine Camille von Otting und Fünfstetten (born von Schönfeld; 24 May 181018 May 1876), who was a morganatic descendant of the Counts Palatine of Zweïbrucken and the Margraves of Baden Durlach. Baroness Wilhelmine Marie (11 August 183722 November 1912), unmarried. Baron Ludwig (9 June 18392 February 1910), married Amalie Barbara Löw, sometimes written Loewe. Baroness Marie Wilhelmine (9 June 18405 July 1908), married Ludwig Heinrich Hesse, sometimes written Hess. Baron Heinrich Adolph Maximilian Ludwig (31 July 184517 January 1908), unmarried. Baron Albert Ludwig Friedrich (9 February 184720 January 1901), married Antoinette de Senarclens de Grancy, a cousin. Baroness Constance Marie Wilhelmine (11 September 18529 March 1933), married Karl von Oertzen.