William I, Elector of Hesse was the eldest surviving son of Frederick II, Landgrave of Hesse-Kassel and Princess Mary of Great Britain, the daughter of George II.
- Occupation
- ruler, politician
- Position held
- Prince-Elector
- Citizenship
- Electorate of Hesse
- Born
- June 3, 1743
- Died
- February 27, 1821