Carl Erik Mannerheim was born in
Säter the third and youngest son of the
Artillery Colonel and the
Gothenburg Commandant,
Johan Augustin Mannerheim (1706–1778) and his second spouse, Helene Maria Söderhjälm (1722–1793). In 1796 he married Baroness , daughter of Baron
Ernst Gustaf von Willebrand, a wealthy general and governor of
Turku and Pori Province 1790–1806, and his wife Wendla Gustava Wright and maternal aunt of
Aurora Karamzin. In 1809 Mannerheim became a member of the
Diet of Porvoo and took part in the creation of
Grand Duchy's institutions. He was the main figure in the Finnish delegation sent to the Russian Emperor that discussed Finland's future within the tsar's realm. He became the first
Vice Chairman of the Economic Division of the Senate of Finland in 1822 and served until 1826. He was a great grandfather of
Carl Gustaf Emil Mannerheim. ==Gallery==