Alexander married on 3 May 1900 in
Arolsen,
Princess Elisabeth of Waldeck and Pyrmont (1873–1961), seventh child and youngest daughter of
George Victor, Prince of Waldeck and Pyrmont and Princess Helena of Nassau. They had four children, nine grandchildren, seventeen great-grandchildren and nineteen great-great-grandchildren: • Princess Imma Gustava Marie Louise Pauline Edda Adolphine Hermine of Erbach-Schönberg (11 May 1901 – 14 March 1947) she married Hans Karl Baron von Dornberg on 31 May 1923. She remarried Captain Neil Boyd Watson McEacharn on 1 July 1940 and they were divorced in 1947. • George Louis, Prince of Erbach-Schönberg (1 January 1903 – 27 January 1971) he married Marie-Marguerite von Deringer on 2 July 1925. They had three children, eleven grandchildren and seven great-grandchildren. • Prince William Ernst Heinrich Alfred of Erbach-Schönberg (4 June 1904 – 27 September 1946) he married Countess Alexandra von Gortz on 4 October 1938. They had one daughter Marianne who died at birth. • Princess Helena Sophie Louise Hedwig Emilie Martha of Erbach-Schönberg (8 April 1907 – 16 April 1979), unmarried and without issue. ==Orders and decorations==