List of names in A Biographical Dictionary of Modern Rationalists

Joseph McCabe published A Biographical Dictionary of Modern Rationalists in 1920 (London: Watts & Co.).

Most (though not all) of those listed were also included in A Biographical Dictionary of Ancient, Medieval and Modern Freethinkers (1945)

François-Désiré Bancel
Bust of Jules Barni by Athanase Fossé
Erich Becher
Wilhelm Bolin portrait by Bernhard Reinholdin
Filippo de Boni portrait by Aristide Calani
Daguerreotype of Wilhelm von Braun
Adolphe Brisson
Laureano Calderón y Arana
the grave of Tommaso Cannizzaro
Jean-Louis Carra . Engraving by François Bonneville
Otto Caspari
La Galerie des Empereurs in the Musée Saint-Raymond , Toulouse. From Toulouse monumentale et pittoresque by fr:Jean-Mamert Cayla
Giovanni Alfredo Cesareo
Vincenzo Crescini
Hector Denis
Konrad Deubler
Jacques-Antoine Dulaure
Johann Christian Edelmann
Bruto Fabricatore
Adolphe Franck
Charles Ferdinand Gambon
The tomb of Antonio Rodríguez García-Vao
Giuseppe Gorani
Eduard Grisebach
Nikolai Yakolevich Grot
Louis Gruyer
Ange Guépin
Adolphe Georges Guéroult
Cover of the first edition of De Dageraad of which Frans Christiaan Günst was a writer
Büste von Friedrich Jodl im Arkadenhof der Universität Wien
Mauro Macchi
Plaque to Alberto Mario in Adria
Charles Frédéric Martins
Filippo Masci
The tomb of Marie-Alexandre Massol in Cimetière du Père-Lachaise , Paris
Jean-Baptiste Millière
Antoine Mongez and Marie-Joséphine-Angélique Mongez
Edgar Monteil
Adrien de Mortillet
Christen Anton Nyström
José María Orense (seated). Taken probably in Madrid, during the visit of Giuseppe Fanelli (furthest right) to Spain.
Felix Leopold Oswald
Albert Regnard
Charles Ribeyrolles
Gustave Rivet
Albert Édouard Charles Robin
Louis-Augustin Rogeard . Detail from a painting by Louis Tinayre
Sicco Roorda van Eysinga
The grave of François Walferdin in the Père Lachaise Cemetery
Plaque on the house where Christian Ernst Wünsch lived in the Mühlenweg student quarter of Frankfurt (Oder)
Francisco Zarco