Gustaf Mannerheim was born on 4 June 1867 in Askainen, Finland. He was previously married to Anastasia Arapova. He died on 27 January 1951 in Lausanne, Vaud, Switzerland.
Mannerheim was born in the Duchy of Finland, then a part of Russia. His native language was Swedish. In 1896 Mannerheim was appointed official personal guard to Tsar Nicholas II at his coronation. At that time he married a Russian princess and had two daughters.