Princess Marie Luise Charlotte of Hesse-Kassel (9 May 1814 – 28 July 1895). Married Prince Frederick Augustus of Anhalt-Dessau. Louise of Hesse-Kassel (7 September 1817 – 29 September 1898). Married King Christian IX of Denmark. Friedrich Wilhelm (26 November 1820 – 14 October 1884). Head of House of Hesse-Kassel.
Prince Frederick William of Hesse-Kassel was born in Copenhagen on 26 November 1820. He moved to Denmark with his family at the age of three, and grew up there. He attended the university in Bonn, and then began a military career. In 1843 he was third in line for the Danish throne after the King's son and brother, Prince Ferdinand.