Wilhelm married Auguste Victoria Von Schleswig-Holstein-Sonderburg-August on 27 Feb 1881 in Berlin, Germany. Auguste (daughter of Prince Friedrich Von Schleswig-Holstein-Sonderburg-August and Adelheid Von Hohenlohe-Langenburg) was born on 22 Oct 1858; died on 11 Apr 1921. [Group Sheet] [Family Chart]
Viktoria married Prince Ernst August Von Braunschweig on 24 May 1913. Ernst was born on 17 Nov 1887; died on 30 Jan 1953. [Group Sheet] [Family Chart]
Friederike married King Paul I Of Greece on 9 Jan 1938. Paul (son of King Konstantin I Of Greece and Princess Sophie Von Preussen) was born on 14 Dec 1901; died on 6 Mar 1964. [Group Sheet] [Family Chart]