Answer
Gustaf VI Adolf was a member of the House of Bernadotte, which is a royal house that has ruled Sweden since 1818. The House of Bernadotte is a branch of the House of Hesse-Cassel, and was founded by Jean-Baptiste Bernadotte, a French general who was adopted by the Swedish king Charles XIII in 1810. The House of Bernadotte has produced five kings of Sweden, including Gustaf VI Adolf.