People beginning with J
- Jaboulay, Mathieu
- Jabs, Douglas A.
- Jaccoud, Sigismond
- Jackson, Jabez North
- Jackson, Chevalier
- Jackson, John Hughlings
- Jacob, Arthur
- Jacobsohn, Louis
- Jacquelin, A.
- Jacquet, Leonard Marie Lucien
- Jadassohn, Josef
- Jaeger Ritter von Jaxtthal, Christoph Friedrich
- Jaffe, Henry Lewis
- Jahnke, Unknown
- Jakob, Alfons Maria
- Jaksch, Rudolf von
- James, George C. W.
- James Stanfield, Collier
- Jampel, Robert Steven
- Janet, Pierre Marie Félix
- Jansky, Jan
- Janz, Dieter
- Jarcho, Saul Wallenstein
- Jarisch, Adolf
- Jarisch, Junior, Adolf