any of various swallows of the genera Progne, Delichon, Riparia, etc, having a square or slightly forked tail

Archer John Porter. 1910–2002, British biochemist; Nobel prize for chemistry 1952 (with Richard Synge; 1914–94) for developing paper chromatography (1944). He subsequently developed gas chromatography (1953)

Chris(topher Anthony John). born 1977, English rock musician; lead singer of Coldplay

Frank. 1890–1974, Swiss composer. He used a modified form of the twelve-note technique in some of his works, which include Petite Symphonie Concertante (1946) and the oratorio Golgotha (1949)

Sir George (Henry). 1926–2016, British record producer and arranger, noted for his work with the Beatles

John. 1789–1854, British painter, noted for his visionary landscapes and large-scale works with biblical subjects

Michael (John). Baron. (1945–2018), Scottish Labour politician; speaker of the House of Commons (2000–09)

Paul (Edgar Philippe). born 1938, Canadian Liberal politician; prime minister of Canada (2003–06)

Saint. called Saint Martin of Tours. ?316–?397 ad, bishop of Tours (?371–?397); a patron saint of France. He furthered monasticism in Gaul. Feast day: Nov 11 or 12

Steve(n). born 1945, US film actor and comedian; his films include The Jerk (1979), Roxanne (1987), and Bowfinger (1999)