Karl, Prince of Leiningen  Karl, Prince of Leiningen (; 13 February 18982 August 1946) was the son of Emich, 5th Prince of Leiningen. He was the 6th Prince of Leiningen from 1939 until his death. Karl was born at Straßburg, German Empire (which later became Strasbourg in France) (some websites have erroneously give Straßburg, Austria), the second child and first son of Emich, 5th Prince of Leiningen (1866–1939) (son of Ernst Leopold, 4th Prince of Leiningen and Princess Marie Amelie of Baden) and his wife, Princess Feodore of Hohenlohe-Langenburg (1866–1932) (daughter of Hermann, Prince of Hohenlohe-Langenburg and Princess Leopoldine of Baden). Through his father he was descendant of Gustav IV Adolf of Sweden. Karl married on 25 November 1925 in Langenburg to Grand Duchess Maria Kirillovna of Russia (1907–1951), eldest child of Cyril Vladimirovich, Grand Duke of Russia and his wife, Princess Victoria Melita of Saxe-Coburg and Gotha and his third cousin through descent from Princess Victoria of Saxe-Coburg-Saalfeld. (Karl is descended from the son of Victoria's first marriage and Maria's descent is from the daughter of Victoria's second marriage). They had seven children:  On the death of his father in 1939, Karl succeeded as the 6th Prince of Leiningen. He was a prisoner of war in the Soviet Union where he died in 1946 at Saransk.