Question: Who is the paternal grandfather of Carl Robert Mannerheim?
Sentence (from "Carl Gustaf Mannerheim (naturalist)"): Count Carl Gustaf Mannerheim (August 10, 1797 in Askainen, Finland to October 9, 1854 in Stockholm, Sweden) was a Finnish entomologist and governor of the Viipuri province in the Grand Duchy of Finland.
Relevant evidence: No