Frederick married Princess Helena Augusta Victoria Of Saxe-Coburg on 05 Jul 1866 in Windsor Castle, Windsor, Berkshire, England. Helena (daughter of Prince Saxe-Coburg-Gotha Albert Francis Augustus Charles and Queen of England Victoria Hanover) was born on 25 May 1846 in Buckingham Palace, London, Middlesex, England; died on 09 Jun 1923 in Schomberg House, Pall Mall, London, England. [Group Sheet] [Family Chart]

1. Christian Victor was born in 1867; died in 1900.
2. Duke Albert of Schleswig-Holstein was born in 1869; died in 1931.
3. Princess Helena Victoria was born in 1870; died in 1948.
4. Princess Marie Louise was born in 1872; died in 1956.
5. Frederick Harold was born on 12 May 1876; died on 20 May 1876.