Karl of Brunswick-Wolfenbüttel1766 - 1806 Born Sat, 8 February 1766 London Died Sat, 20 September 1806 Details Parents Hereditary Prince Karl Georg August Lived 40 years, 7 months, 12 days father Charles William Ferdinand 1735 - 1806 mother Augusta of Great Britain 1737 - 1813 Siblings Sister Augusta of Brunswick-Wolfenbüttel 1764 - 1788 Sister Caroline of Brunswick 1768 - 1821 Brother Georg Wilhelm Christian 1769 - 1811 Brother August 1770 - 1822 Brother Frederick William of Brunswick-Wolfenbüttel 1771 - 1815 Sister Amelie Karoline Dorothea Luise 1772 - 1773