Lapw
- Lebe
- Lapworth , Charles
- Larmor , Sir Joseph
- Lartet , Edouard Armand Isidore Hippolyte
- Lassell , William
- Laue , Max von
- Laughlin
- Laughlin , Robert B.
- Laurent , Auguste
- Laveran , Charles Louis Alphonse
- Lavoisier
- Lavoisier , Antoine Laurent
- Lavoisier , Marie Anne Pierrette
- Lavoisier, Antoine
- Lawes , Sir John Bennet
- Lawrence , Ernest Orlando
- Le Bel , Joseph Achille
- Le Bel, Joseph Achille
- Le Chatelier , Henri Louis
- Le Chatelier, Henri Louis
- Le Verrier
- Le Verrier , Urbain Jean Joseph
- Leakey , Louis Seymour Bazett
- Leakey , Mary
- Leakey , Richard Erskine
- Leakey, Louis Seymour Bazett
- Leavitt , Henrietta Swan