Prince William of Hesse-Kassel [SEP] mother
Prince William of Hesse-Kassel
Prince William of Hesse-Kassel (24 December 1787 – 5 September 1867), was the first son of Prince Frederick of Hesse-Kassel and Princess Caroline of Nassau-Usingen.
Marriage and children.
On 10 November 1810, William was married in Amalienborg Palace to Princess Louise Charlotte of Denmark (1789–1864) daughter of Hereditary Prince Frederick of Denmark and Norway (1753–1805) and Sophia Frederica of Mecklenburg-Schwerin (1758–1794).
Children of marriage: 
- Karoline Friederike
Frederick William, Elector of Hesse
Frederick William I (20 August 1802 – 6 January 1875) was, between 1847 and 1866, the last Prince-elector of Hesse-Kassel (or Hesse-Cassel).
Life.
He was born at Hanau, the son of Prince William, later William II, Elector of Hesse, and Princess Augusta of Prussia, daughter of Frederick William II of Prussia.
During the French occupation of Hesse-Kassel (1806–1813) he stayed with his mother in Berlin.