Prince Gustaf Adolf Oscar Fredrik Arthur Edmund, Duke of Västerbotten (22 April 1906 - 26 January 1947) was a Swedish prince and heir to the Swedish throne. Born in Stockholm, he was the eldest son of Prince Gustaf Adolf of Sweden (the future King Gustaf VI Adolf) and his first wife Princess Margaret of Connaught. His mother was a granddaughter of Queen Victoria as the daughter of Prince Arthur, Duke of Connaught. Gustaf Adolf was the father of the current king, Carl XVI Gustaf. He was known by his last given name, Edmund, in the family.