 Landgraf Wilwelm Hessen-Kassel IX, son of Landgraf Friedrich Hessen-Kassel III and Karoline Polyxena Nassau-Usingen.Born 24 Dec 1787 Biebrich, died 05 sep 1867, 79 years Married/ Related to:  Louisa Charlotte Oldenburg, daughter of Frederik Oldenburg, Prince and Sophia Frederica Mecklenburg-Schwerin.Born 30 Oct 1789, died 28 Mar 1864, 74 years Child: | |||