Count Carl Gustaf Mannerheim was a Finnish entomologist and governor of the Viipuri province in the Grand Duchy of Finland. Wikipedia
Born: August 10, 1797, Askainen, Finland
Died: October 9, 1854 (age 57 years), Stockholm, Sweden
Grandchildren: Carl Gustaf Emil Mannerheim, Sophie Mannerheim, and Eva Mannerheim-Sparre
Children: Carl Robert, Count Mannerheim
Grandparents: Johan Augustin Mannerheim and Helena Maria Söderhjelm
Parents: Carl Erik Mannerheim
Great grandchildren: Anastasie Mannerheim, Sophie Mannerheim, and Clas Sparre