Gerard De Geer
Baron Gerard Jacob De Geer ForMemRS was a Swedish geologist who made significant contributions to Quaternary geology, particularly geomorphology and geochronology. De Geer is best known for his discovery of varves.
De Geer was born in Stockholm, Sweden, on October 2, 1858. His family, originally Dutch nobility who had emigrated to Sweden in the early seventeenth century, included prominent industrialists and politicians. Both De Geers father and older brother were Prime Minister of Sweden, and De Geer himself was a member of the Swedish Parliament from 1900 to 1905.
Source: Wikipedia