Friedrich Günther, Prince of Schwarzburg (5 March 1901 – 9 November 1971) was the final head of the House of Schwarzburg and heir to the formerly sovereign principalities of Schwarzburg-Rudolstadt and Schwarzburg-Sondershausen. Early life He was born in Großharthau in the Kingdom of Saxony the son of Prince Sizzo von Leutenberg (1860–1926) and his wife, Princess Alexandra of Anhalt (1868–1958). On 21 April 1896, his father had been recognised as a dynast of the house as Prince Sizzo of Schwarzburg, having previously lacked succession rights due to his parents' morganatic marriage. In 1909 the two Schwarzburg principalities were united in a personal union under Prince Günther of Schwarzburg-Rudolstadt. This followed the extinction of the elder Sondershausen branch, at which point Friedrich Günther became second in line to the united principality, following Sizzo. But the German Revolution prompted Prince Günther to abdicate on 22 November 1918, thereby ending the rule of the House of Schwarzburg. After Prince Günther's death on 16 April 1925, Sizzo succeeded as head of the deposed princely House of Schwarzburg until his own death on 24 March 1926, which left his son Friedrich Günther as the head of the family and claimant to the throne of the Principality of Schwarzburg. Marriage Prince Friedrich Günther was married on 7 April 1938 at Heinrichau (present-day Henryków, Lower Silesian Voivodeship, Silesia) to Princess Sophie of Saxe-Weimar-Eisenach (1911–1988), eldest daughter of William Ernest, Grand Duke of Saxe-Weimar-Eisenach. The marriage proved short-lived and less than a year later on 1 November 1938 they were divorced, without children. Death and succession Following Friedrich Günther's death in 1971 in Munich the male line of the House of Schwarzburg became extinct. Historically the Schwarzburg principalities could descend by semi-Salic primogeniture: in the event of the extinction of all male dynasts (as happened with the death of Prince Friedrich Günther) females were, prior to abolition of the Principality of Schwarzburg in 1918, eligible to inherit the throne. Princess Marie Antoinette of Schwarzburg (1898–1984), the only sibling of Prince Friedrich Günther, by her 1925 marriage to Count Friedrich Magnus zu Solms-Wildenfels (1886–1945), was the mother of Friedrich Magnus (b. 1927), the sixth Count zu Solms-Wildenfels to bear that name and to head the Wildenfels cadet branch of the House of Solms. Neither of the latter's two sons, Michael (b. 1949) and Konstantin (b. 1950), nor his younger brother, Albrecht (b. 1929), have children. Another interpretation of the