| Name | William_IX of_Hesse-Cassel | |
| Title | Elector | |
| Gender | Male | |
| Person ID | I1736 | Test |
| Last Modified | 13 Jun 2026 | |
| Father | Landgrave Frederick_II of_Hesse-Cassel, b. 1720 d. 1785 (Age 65 years) | |
| Mother | Mary Hanover, b. 5 Mar 1723, Leicester House d. 14 Jan 1772, Hanau (Age 48 years) | |
| Marriage | 28 Jun 1740 | Cassel |
| Family ID | F622 | Group Sheet | Family Chart |