Lesseps,
Ferdinand, Vicomte de Lesseps Laithwaite,
Eric Robert Lanchester,
Frederick William Langley,
Samuel Pierpoint Latimer,
Louis (Howard) Laval,
Carl Gustaf Patrik de Lenoir,
Jean Joseph Etienne Lighthill,
Micheal James Lilienthal,
Otto Locke,
Joseph Lodge,
Oliver Joseph Lovell,
Bernard Lumière,
Auguste Marie and Louis Jean Leonardo
da Vinci Lippmann,
Gabriel