From left to right, Kaiser Wilhelm II, Friedrich, Eitel, Adalbert, August, Oscar and Joachim lead a military parade in Berlin. Wilhelm and his first wife, Princess Augusta Victoria of Schleswig-Holstein, were married in 1881 and had seven children. Crown Prince Friedrich Wilhelm Victor August Ernst of Germany (May 6, 1882 - July 20, 1951) the last Crown Prince of the Kingdom of Prussia and the German Empire. Prince Wilhelm Eitel Friedrich Christian Karl (July 7, 1883 -December 8,1942). Prince Adalbert Ferdinand Berengar Viktor of Prussia (July 14, 1884 - September 22, 1948). Prince August Wilhelm Heinrich G羹nther Viktor of Prussia (January 29, 1887- March 25, 1949). Prince Oskar Karl Gustav Adolf Prinz von Preuben of Prussia (July 27, 1888 - January 27, 1958). Prince Joachim Franz Humbert of Prussia (December 17, 1890 - July 18, 1920).