Encyclopedias, Almanacs, Transcripts, and Maps
- John Wilkinson
- John Willard Milnor
- John William Mauchly
- John William Strutt
- John Woodall
- John XXII, Pope (ca. 1244-1334)
- Johndro, L. Edward (1882-1951)
- Johnson, Alice (1860-1940)
- Johnson, Douglas (ca. 1909-1988)
- Johnson, Mrs. Roberts (fl. ca. 1918)
- Johnson, Raynor C(arey) (1901-1987)
- Johnston, Harold S. (1920- )
- Joint and Jointing
- Joire, Paul (1856-?)
- Jokichi Takamine
- Jon E. Ahlquist
- Jon Gardener
- Jonas Norberg
- Jonas, Hans
- Jonathan Carter Hornblower