Jans
- Jung
- Jansky , Karl Guthe
- Janssen
- Janssen , Pierre Jules César
- Janssen , Zacharias
- Jeffreys , Sir Alec John
- Jeffreys , Sir Harold
- Jenner
- Jenner , Edward
- Jensen
- Jensen , Johannes Hans Daniel
- Jerne
- Jerne , Niels Kaj
- Johannsen , Wilhelm Ludwig
- Johanson , Donald Carl