Jabir ibn Hayyan (c. 721–c. 815)

Jackson, Chevalier (1865–1958)

Jackson, John Hughlings (1835–1911)

Jacob, François (1920–2013)

Jacobi, Carl Gustav Jacob (1804–1851)

Jacobi, Mary Corinna Putnam (1842–1906)

Jacquard, Joseph Marie (1752–1834)

Jaenisch, Rudolf

Jaffe, Lionel F(rancis) (1927–2011)

James, Charles (1880–1928)

Janeway, Edward Gamaliel (1841–1911)

Janeway, Theodore Caldwell (1872–1917)

Jansky, Karl Guthe (1905–1950)

Janssen, (Pierre) Jules César (1824–1907)

Janssen, Zacharias (1580–1638)

Janzen, Daniel H(unt) (1939– )

Jeans, James Hopwood (1877–1946)

Jeffreys, Alec John (1950– )

Jemison, Mae Carol (1956– )

Jenkin, Henry Charles Fleeming (1833–1885)

Jenner, Edward (1749–1823)

Jenner, William (1815–1898)

Jennings, Herbert S(pencer) (1868–1947)

Jensen, (Johannes) Hans (Daniel) (1907–1973)

Jensen, Peter Laurits (1886–1961)

Jerne, Niels Kaj (1911–1994)

Jervis, John B(loomfield) (1795–1885)

Jessop, William (1745–1814)

Jewett, Frank Baldwin (1879–1949)

Jobs, Steve(n) Paul (1955–2011)

Johannsen, Wilhelm Ludvig (1857–1927)

Johnson, Clarence L (‘Kelly’) (1910–1990)

Johnson, Douglas (Wilson) (1878–1944)

Johnson, Louise Napier (1940–2012)

Johnson, Martin W(iggo) (1893–1984)

Johnson, Robert Wood (1845–1910)

Johnson, Samuel William (1830–1909)

Johnson, Virginia (1925–2013)

Joliot-Curie, Frédéric (1900–1958)

Joliot-Curie, Irène (1897–1956)

Joliot-Curie, Irène (1897–1956) and Frédéric (1900–1958) (1900–1958)

Joly, John (1857–1933)

Jones, D(onald) F(orsha) (1890–1963)

Jones, E(rnest) Lester (1876–1929)

Jones, Harold Spencer (1890–1960)

Jones, William (1675–1749)

Jordan, (Marie Ennemond) Camille (1838–1922)

Josephson, Brian David (1940– )

Joslin, Elliott P (1869–1962)

Joule, James Prescott (1818–1889)

Joy, Alfred Harrison (1882–1973)

Julian, Percy (Lavon) (1899–1975)

Jung, Carl Gustav (1875–1961)

Just, Ernest Everett (1833–1941)