Encyclopedias, Almanacs, Transcripts, and Maps
- Jones, Franklin Albert (1939-)
- Jones, Marc Edmund (1888-1980)
- Jonson, Mr. (1854-?) and Mrs. J. B. Jonson
- Jonsson, Olof (1918-)
- Joost Bürgi
- Jordan, Pacual (1902-ca. 1982)
- Jordanus Nemorarius
- Jordanus of Séverac
- Jose Celestino Mutis
- Josef Gottlieb Köhlreuter
- Josef Stefan
- Joseph Aspdin
- Joseph Barrell
- Joseph Black's Pioneering Discoveries about Heat
- Joseph de Beauchamp
- Joseph Edward Murray
- Joseph Everett Dutton
- Joseph F. Rock
- Joseph Gaertner
- Joseph Goldberger