About Adrian Conan Doyle
Adrian Malcolm Conan Doyle (19 November 1910 – 3 June 1970) was the youngest son of Sir Arthur Conan Doyle and his second wife Jean, Lady Doyle or Lady Conan Doyle. He had two siblings, sister Jean Conan Doyle and brother Denis, as well as two half-siblings, sister Mary and brother Kingsley. Adrian has been depicted as a racing car driver, big-game hunter, explorer, and writer. Biographer Andrew Lycett calls him a "spendthrift playboy" who (with his brother Denis) "used the Conan Doyle estate as a milch-cow". He married Danish-born Anna C. Anderson, and was his father's literary executor after his mother died in 1940. He founded the Sir Arthur Conan Doyle Foundation in Switzerland in 1965. On his death, his sister Jean took over as their father's literary executor.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.