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) A Firmin Abauzit Ernst Abbe Francis Ellingwood Abbot George Frederick Abbott Leonard Dalton Abbott Edmond About Thomas Achelis or Thomas Ludwig Bernhard Achelis ( mentioned in :de:Thomas Otto Achelis, his son) ACKERMANN, Louise V. ACOLLAS, Professor E. ACOSTA, Uriel ADAM, Professor Charles, D. es L. ADAMS, Charles Francis ADAMS, Francis W. L. ADAMS, John, President of the United States ADAMS, Robert ADAMSON, Professor Robert, Ph.D. ADCOCK, A. St. John ADICKES, Professor E., Ph.D. ADLER, Professor Felix, Ph.D. AHRENS, Professor Heinrich, Ph.D. AIKENHEAD, Thomas AIRY, Sir George B., K.C.B., D.C.L., LL.D., F.R.S. AITZEMA, Lieuwe van ALBEE, John ALCOTT, Amos Bronson ALEMBERT, Jean le Rond d' ALFIERI, Count V. ALGAROTTI, Count F. Thomas Clifford Allbutt ALLEN, Grant, B.A. ALLEN, Colonel Ethan ALLEN, John. M.D. ALLINGHAM, William ALLMAN, Professor G. J., LL.D., D.Sc., F.R.S. ALLSOP, Thomas ALTMEYER, Professor J. J., Ph.D., D.C.L. ALVIELLA, Count Goblet d' AMARI, Professor M. AMICIS, Edmondo de AMIEL, Henri F. ANDERSON, George B Ba François-Noël Babeuf Guido Baccelli Robert Bage Walter Bagehot Jens Immanuel Baggesen Julius Bahnsen Karl Friedrich Bahrdt Samuel Bailey George Baillie () Alexander Bain Mikhail Bakunin James Mark Baldwin William Platt Ball () John Ballance José Manuel Balmaceda Eduard Baltzer Honoré de Balzac François-Désiré Bancel ( see :fr:François-Désiré Bancel) Hubert Howe Bancroft Giuseppe Baretti George Barlow Jane Barlow Joel Barlow Antoine Barnave J. Edmestone Barnes () Jules Barni ( see :fr:Jules Barni and :hu:Jules Barni) François Odysse Barot () Thomas Squire Barrett () Jules Barthélemy-Saint-Hilaire Paul Joseph Barthez Hector Alexandre Bartoli ( see :fr:Hector Alexandre Bartoli) Theodor Bartošek ( see :cs:Theodor Bartošek) Giacomo Barzelotti () Johann Bernhard Basedow Marie Bashkirtseff John Baskerville Adolf Bastian Henry Charlton Bastian Frédéric Bastiat Henry Walter Bates Angelo Battelli Cesare Battisti Charles Pierre Baudelaire Wolf Wilhelm Friedrich von Baudissin Henri Baudrillart Bruno Bauer Edgar Bauer Ernest Belfort Bax Pierre Bayle Be Charles Marsh Beadnell () Louis de Beausobre August Bebel Cesare Beccaria Erich Becher ( see :de:Erich Becher and :sv:Erich Becher) Walter Frederick Becker () Hubert Beckers William Thomas Beckford Thomas Beddoes Thomas Lovell Beddoes Edward Spencer Beesly Ludwig van Beethoven Elphinstone Waters Begbie () Balthasar Bekker Thomas Evans Bell () Gustave Belot Hedwig Bender ( see :de:Hedwig Bender) Friedrich Eduard Beneke Alfred William