field marshal of Russia; eldest son of Karl, father of Friedrich Leopold Albrecht, Prince of Prussia (1809–1872) — second and youngest son of Karl, father of Albrecht Heinrich, Prince of Prussia (1862–1929) — second son of Friedrich III and brother of Wilhelm II; Grand Admiral in the German Imperial Navy, World War I Kaiserin Victoria (1840–1901) — "Kaiserin Friedrich"; Daughter of Queen Victoria, Princess Royal of Great Britain; wife and Empress consort of Friedrich III; mother of Wilhelm II; Dowager German Empress and Queen Dowager of Prussia, 1888–1901; recognized by Friedrich III, 9 March 1888 Kaiserin Auguste Viktoria (1858–1921) — Princess of Schleswig-Holstein, (first) wife and empress consort of Wilhelm II Kronprinz Wilhelm (1882–1951) — Crown Prince of Germany and Prussia until 1918, World War I-era German general. Friedrich Leopold, Prince of Prussia (1865–1931) — son of Friedrich Karl, father of Friedrich Sigismund, Friedrich Karl, and Friedrich Leopold Albrecht, Prince of Prussia (1837–1906) — only son of Albrecht Friedrich Heinrich, Prince of Prussia (1874–1940) — eldest son of Albrecht and grandson of Albrecht Joachim Albrecht, Prince of Prussia (1876–1939) — second son of Albrecht and grandson of Albrecht Friedrich Wilhelm, Prince of Prussia (1880–1925) — third son of Albrecht and grandson of Albrecht Eitel Friedrich, Prince of Prussia (1883–1942) — second son of Wilhelm II Adalbert, Prince of Prussia (1884–1948) — third son of Wilhelm II August Wilhelm, Prince of Prussia (1887–1949) — fourth son of Wilhelm II Oskar, Prince of Prussia (1888–1958) — fifth son of Wilhelm II Waldemar, Prince of Prussia (1889–1945) — eldest son of Prince Heinrich, Grand Admiral Joachim, Prince of Prussia (1890–1920) — sixth and youngest son of Wilhelm II Friedrich Sigismund, Prince of Prussia (1891–1927) — eldest son of Friedrich Leopold; World War I pilot Friedrich-Karl, Prince of Prussia (1893–1917) — second son of Friedrich Leopold; Bronze medallist in the 1912 Olympics; World War I pilot; wounded in action, taken POW, and died of wounds (1917) Friedrich Leopold, Prince of Prussia (1895–1959) — third and youngest son of Friedrich Leopold Sigismund, Prince of Prussia (1896–1978) — second and youngest son of Prince Heinrich, Grand Admiral Wilhelm, Prince of Prussia (1906–1940) — eldest son of Crown prince Wilhelm Princely House of Hohenzollern Karl Anton, Sovereign Prince Hohenzollern-Sigmaringen (1811–1885) Leopold, Sovereign Prince Hohenzollern-Sigmaringen (1835–1905) — son of Karl Anton Wilhelm, Sovereign Prince Hohelnzollern-Sigmaringen (1864–1927) Ferdinand, Prince of Hohenzollern-Sigmaringen (b. 1865) — brother of Sovereign Prince Wilhelm,