John Kirby (December 31, 1908 – June 14, 1952), was an American jazz double-bassist and bandleader. In addition to sideman work (prominently with Benny Goodman), Kirby is remembered for leading a successful chamber jazz sextet in the late 1930s and early 1940s, which scored several hit songs including “Loch Lomond” and the debut recording of “Undecided“, a jazz standard. He is perhaps the first musician in the chamber jazz genre. Earlier in his career he also played trombone and tuba. Kirby was born John Kirk in Winchester, Virginia, United States, on 31 December 1908. His mother, Dolly Kirk (died October 1925) gave him up for adoption in 1908 and he was raised by Reverend Washington Johnson and his wife, Nancy, at 442 North Kent Street in Winchester. (Kirby is listed as a household member in the 1920 United States Federal Census, but not in the 1910 census.)