•
Jules Guesde (1845–1922), founding member and elected deputy •
Paul Lafargue (1842–1911), son-in-law of
Karl Marx and elected deputy •
Marcel Cachin (1869–1958), member from 1891, led the SFIO Tours split in 1920, future director of ''
L'Humanité'' • (1861–1955), professor (Greek Philosophy) and future elected deputy for the SFIO • (1873–1953), elected deputy
Isère (1898–1910) •
Bernard Cadenat (1853–1930), shoemaker, elected deputy
Bouches-du-Rhône (1898–1919 and 1924–1930) and mayor of
Marseille (1910–1912) •
Ulysse Pastre (1864–1930), researcher and elected deputy
Gard (1898–1910) • (1852–1909), printer, elected deputy
Hérault (1898–1909) and president of the typography workers union • (1860–1936), barber, elected deputy Seine (1893–1898) and founder of the coiffeurs workers union who quit the SFIO in 1914 to found a small workers party promoing a return to class war •
Hubert Lagardelle (1875–1968),
revolutionary syndicalist • , elected deputy for Marseille in 1898–1910, mayor of
Toulon (1893) and vice president of the General Council (1914–1915) • Jean Bertrand, elected deputy for
Corbeil •
Pierre Mélin (1863–1929)
luthier, vice president of the Valenciennes's Labour Court and elected deputy •
Georges Vacher de Lapouge (1854–1936), antisemitic anthropologist and eugenist, Attorney of the Republic and professor == See also ==