- A. Rebenstein → Bernstein, Aaron David
- A.A. Bradley → Bradley, Aaron Alpeoria
- Abad Moreno, Francisco
- Abad y Queipo, Manuel
- Abarbanel
- Abarbanel
- Abarbanel
- Abarbanell →
- Abarca, Joaquín
- Abbas I.
- Abbas Mirsa
- Abbé Sieyès → Sieyès, comte , Emmanuel Joseph
- Abbé de La Roche-Arnaud → Marcet de La Roche-Arnaud, Martial
- Abbé de Saint-Pierre → Castel de Saint Pierre, Charles Irénée
- Abbot, Charles, 2nd Baron Colchester
- Abd Allah
- Abd ar-Rahman III.
- Abd el-Kader
- Abd ül-Hamid I.
- Abd ül-Medjid I.
- Abd-ül-Hamid II.
- Abel, Karl
- Abella, Manuel
- Abendroth, Heinrich von
- Abercorn, James Hamilton, 1st Duke of
- Aberdeen, George Hamilton Gordon
- Aboreda, Francisco
- About, Edmond François Valentin
- Abraham
- Abril, Juan
- Abt, Gottlieb Christian
- Abt Sieyes → Knesebeck, Karl Friedrich, Freiherr von dem
- Abu Bakr
- Abuin, Saturnino
- Abul Kasim ibn Abdallah →
- Achates
- Achila
- Achille → Leroy de Saint-Arnaud, Arnaud Jacques
- Achilles → Lassalle, Ferdinand
- Achilleus
- Ackermann, Karl Gustav
- Ackroyd
- Acland, James
- Acland, 11th Baronet, Sir Thomas Dyke
- Acollas, Émile
- Acquaviva d’Aragona, Claudio
- Acton, Henry Morrell
- Acton, John Emerich Edward Dalberg
- Adair, Robert Alexander Shafto, 1st Baron Waveney
- Adalbero von Laon
- Adalbert von Chrzanowski → Chrzanowski, Wojciech
- Adam
- Adam de Vignacourt
- Adam von Bremen
- Adams, Charles Francis
- Adams, John
- Adams, William Bridges ( Pseudonym: Junius Redivivus)
- Adamski, Teofil
- Adamson, Robert
- Addington, Henry, 1st Viscount Sidmouth
- Addison, Joseph
- Adelfeld → Stern, Jakob
- Adelung, Johann Christoph
- Adenan, T.
- Aders → Siebel, Philippine
- Adler, Georg
- Adler, Friedrich
- Adler, Victor
- Adler, Emma
- Adlerfelt, Gustaf
- Adolf Frederik
- Adolf von Nassau
- Adolf VIII. von Holstein-Schauenburg
- Adrian
- Adrien
- Aelius Hadrianus, Publius
- Aella
- Aenneken → Griesheim, Anna von
- Aepinus, Franz Ulrich Theodor
- Aeschines →
- Aesop →
- Affre, Denis Auguste
- Afinger, Bernhard
- Afonso VI.
- African → Lafargue, Paul
- Agamemnon
- Agar y Bustillo, Pedro
- Agassiz, Louis Jean Rodolphe
- Agossa, J.
- Agramante
- Agrippa →
- Aguado, marqués de las Marismas, Alejandro
- Aguilar, Manuel María de
- Aguirre, José Maria de
- Aguirre, Pedro
- Aguirre y Solarte, José Ventura
- Ahmed Fevzi Pascha
- Ahmed Wasif Efendi
- Ahmed I.
- Ahmed II.
- Ahmed III.
- Ahn, Johann Franz
- Ahriman
- Aigle
- Aiguillon, Emmanuel-Armand Vignerot du Plessis de Richelieu, duc d'
- Aikin, John
- Ailloud, Jean-Alphonse
- Ailly, Pierre d'
- Aineias
- Aischines
- Aischylos
- Aisopos
- Aisopos
- Aix-Artaud de Montauban, Jacques d’
- Ajassa, Ajopa → Agossa, J.
- Akakios
- Akif Ahmed Efendi
- Aksakov, Ivan Sergeevič
- Aksel’rod, Pavel Borisovič
- Akßakoff → Aksakov , Ivan Sergeevič
- Al-Hakim
- Al-Kamil Mohammed al-Malik
- Al-Mustansir bi-llah
- Al-Nasir Shihab-ed-Din Ahmed
- Alaix, conde de Vergara, Isidro
- Alameda, Cirilo
- Alaux, Jules-Émile
- Alava, Miguel Ricardo de
- Alba
- Alba, Fernando de Silva y Álvarez de Toledo, 12 duque de
- Alba, Fernando Álvarez de Toledo, 3 duque de
- Alba, Jacobo Luis Stuart Fitz-James
- Alba, Herzog von
- Albedyll, Emil von
- Alberich
- Alberich → Marx, Eleanor
- Alberoni, Giulio
- Albert von Sachsen
- Albert von Sachsen-Coburg und Gotha, Herzog zu Sachsen
- Alberts
- Albin von Angers →
- Albinus
- Alboin
- Albrecht Friedrich
- Albrecht der Fromme → Albrecht VII., von Österreich
- Albrecht von Brandenburg-Ansbach
- Albrecht, Prinz von Preußen
- Albrecht V.
- Albrecht VII., von Österreich
- Albuquerque, Afonso de
- Albuquerque, José María, duque de
- Albêca, d'
- Alcalá Galiano, Antonio
- Alcalá Galiano, Antonio
- Alcocer, José María
- Alcock, Thomas
- Alcudia, Antonio Saavedra Jofré, conde de
- Aldama é Irabien, Juan Antonio, conde de Belascoaín
- Aldovrandi, P.
- Aleksandar Karađorđević
- Aleksandr I
- Aleksandr II
- Aleksandr III
- Aleksandra Fedorovna
- Aleksandra Nikolaevna
- Alekseev, Nikolaj Aleksandrovič
- Aleksej Michajlovič
- Aleksej Petrovič
- Alembert, Jean Le Rond d’
- Alerini, Charles
- Alessandro Farnese →
- Alexander →
- Alexander, Michael Solomon
- Alexander, Nathaniel
- Alexander, Richard Dykes
- Alexander
- Alexander II.
- Alexander Ludwig Georg Friedrich Emil, Prinz von Hessen und bei Rhein
- Alexander Nikolajewitsch von Lüders →
- Alexander III. (Alexander der Große)
- Alexander VI.
- Alexander VII.
- Alexander VIII.
- Alexandra
- Alexandros III →
- Alexandru Ioan Cuza
- Alfonso
- Alfonso II
- Alfonso IX
- Alfonso V (Aragón)
- Alfonso V (Léon)
- Alfonso VIII
- Alfonso X (el Sabio)
- Alfonso XI
- Alfred der Große
- Ali Pascha
- Ali Pascha bin Vuli
- Ali-Pascha, Mehemed
- Alison, Archibald
- Alisov, Petr Ḟedosěevič
- Alkaios
- Allais, Louis-Pierre-Constant
- Allan, William
- Allemandi, Michele Napoleone
- Allemane, Jean
- Allen, William Philip
- Allen, George
- Allen, George R.
- Allen → Titus, Silas
- Allen → Sexby, Edward
- Allende Salazar, José
- Allmann, Julius
- Allonville, Armand Octave Marie, vicomte d’
- Allsop, Thomas
- Almodóvar, Ildefonso Díaz de Ribera, conde de
- Alonso Rubio, Agustín
- Alonso Ruiz de Conejares, José
- Alonso de Cuevillas, Hilario
- Alsager, Thomas Massa
- Altenhöfer, August Joseph
- Altgeldt, Hermann
- Althaus, Friedrich
- Altmann, A.
- Altmeyer, Jean-Jacques
- Altstaetter, Gustav
- Alvarez Osorio y Redin, Miguel
- Alvarez de Castro, Mariano
- Alvarez de Mendieta, Jaime
- Alvarez de Palma, Blas Joaquin
- Alvarez de Toledo, José
- Alvensleben, Gustav von
- Alós, José María de
- Amarante, Francisco da Silveira Pinto da Fonseca, conde de
- Amarillas, Pedro Augustin Girón, 1. duque de Ahumada, marqués de las
- Ambernÿ
- Ambrosius
- Ambrózy, György
- Ameller, Narciso de
- Amelot de la Houssaye, Abraham Nicolas
- Amhlaeibh → Amlaíb Cuarán ,
- Amiel
- Amlaíb Cuarán
- Ammianus Marcellinus
- Ampelius, Lucius
- Ampère, André Marie
- Amphitryon
- An Englishman → Richards, Alfred Bate
- Ananias →
- Anaxagoras
- Anaximandros
- Andéchaga, Castor de
- Anderfuhren, W.
- Anders, Carl
- Anders, Heinrich
- Anderson, George
- Anderson, Adam
- Anderson, James
- Anderson, James
- Anderson, James Andrew
- Anderson, Adam
- Anderson, John Henry
- Andlaw-Birseck, Heinrich Bernhard, Reichsfreiherr von und zu
- Andral, Gabriel
- André, Edith Blanche
- Andreä, Johann Valentin
- Andreas
- Andreas Palaiologos
- Andrews, Esther
- Andrews, Israel De Wolf
- Andrews, Stephen Pearl
- Andrews, Thomas
- Andrieux, François Guillaume Jean Stanislas
- Andronikos II Palaiologos
- Anduaga y Espinosa, Baltasar
- Aner de Esteve, Felipe
- Angel
- Angely, Louis
- Angerstein, Wilhelm
- Anglès, Francois-Ernest
- Anglo-American → Halliburton, Sir Brenton
- Anglona, Pedro Alcántare Tellez Girón, príncipe de
- Anglora, Antonio Marsal
- Anielewski, L.
- Anlaf → Amlaíb Cuarán ,
- Anna →
- Anna (Anna Ivanovna)
- Anna Pavlovna
- Anna Petrovna
- Anna Porphyrogenita →
- Anna von Byzanz
- Anna von Habsburg
- Anna von Österreich
- Annaeus Florus, Lucius
- Annaeus Lucanus, Marcus
- Annaeus Seneca, Lucius
- Anne
- Anne de Beaujeu, duchesse de Bourbon
- Anne de Bretagne
- Anne d’Autriche
- Anneke, Mathilde Franziska
- Anneke, Carl Friedrich Theodor (auch Fritz Anneke)
- Annexander
- Anrep, Joseph Carl von
- Anrep → Anrep, Joseph Carl von
- Anrooij, Henriëtte
- Anrooij, Antonie Johann Wouter van
- Anrooij, Sophie van
- Anseele, Edward
- Anselm von Canterbury
- Ansom
- Anson, Thomas George, 2nd Earl of Lichfield
- Anson, George, 1st Baron Anson
- Anstey, Thomas Chisholm
- Antas, Francisco Xavier da Silva Pereira, conde e visconde das
- Anthing, Johann Friedrich
- Antigone
- Antillón, Isidoro de (Pseudonym: Lucio Veranio)
- Antimos VI.
- Antipatros aus Thessalonike
- Antoine, V.
- Antoine Louis Prosper Lemaître → Lemaitre, A. L. P.
- Antoine y Zayas, Juan
- Anton Günther
- Antonelli, Giacomo
- Antonini, Emidio
- Antonio Pascual de Borbón
- Antonio de Saavedra y Jofré, VII conde de Alcudia y de Gestalgar → Alcudia, Antonio Saavedra Jofré, conde de
- Antonius der Große
- Apelles
- Aphrodite
- Apollo
- Apollodoros aus Athen
- Apollonios von Rhodos
- Apostata →
- Apostata siehe Iulianus
- Appianus (Appianos)
- Applegarth, Robert
- Appleton, L. F.
- Appleton, Nathan
- Appleton
- Appleton, William Henry
- Apponyi, Anton von
- Apponyi, Antal, Graf → Apponyi, Anton von
- Aquaviva, Claudio
- Arago, Dominique François
- Aranda y Castelflorido, Pedro Pablo Abarca de Bolea, conde de
- Arber, Edward
- Arbues, Pedro de
- Arbuthnot, George
- Arbuthnot, John
- Arbuthnot, John
- Arce, Antonio de, marqués de Camarena la Vieja
- Archimedes
- Arco Agüero, Felipe de
- Arcq, Philippe Auguste de Sainte-Foix d’
- Areizaga, Juan Cárlos de
- Arendt, Otto
- Ares
- Arethusa
- Argonauten
- Argos
- Argüelles Álvarez, Agustín
- Ariadne
- Arias Davila, Francisco Javier, conde de Puñonrostro
- Arias Teixeiro, Veremundo
- Arif Hikmet Bei
- Ariosto, Lodovico
- Ariste
- Aristoteles
- Arius
- Arktur
- Arkwright, Sir Richard
- Arlincourt, Charles Victor Prévot, vicomte d’
- Armagnac → Lafargue, Ana Virginia
- Armand-Numa → Jautard, Armand-Numa
- Armandi, Pietro Damiano
- Armandy, F.
- Armansperg, Joseph Ludwig, Graf von
- Armborst, Otto
- Armero de Peñaranda, Francisco, marqués de Nervión
- Arminius
- Armstrong
- Armstrong, Sir William George, 1st Baron Armstrong
- Arnaud, Antoine Jules
- Arnaud du Mans
- Arnauld, Antoine
- Arnd, Karl
- Arndt, Wilhelm Ferdinand
- Arndt, Ernst Moritz
- Arne, Thomas Augustine
- Arnim-Boitzenburg, Adolf Heinrich, Graf von
- Arnim-Heinrichsdorff-Werbelow, Heinrich Friedrich, Graf von
- Arnim-Suckow, Heinrich Alexander Freiherr von
- Arning, Charles
- Arnold
- Arnold, Arthur William
- Arnold, Georges Léon
- Arnoul de Choques
- Arnould, Ambroise Marie
- Arrazola, Lorenzo
- Arrianos, Flavius
- Arrighi de Casanova, duchesse de Padoue
- Arrivabene, Giovanni, conte
- Arsen’ev, Konstantin Ivanovič
- Arteaga
- Arteta, Fermín
- Artin Bei
- Artus
- Asbóth, Sándor
- Ascherson, Ferdinand Moritz
- Asher, Carl Wilhelm
- Ashhurst
- Ashley-Cooper, 7th Earl of Shaftesbury, Anthony
- Ashton, Thomas
- Asplet, Charles
- Asplet, Philippe
- Assarino, Luca
- Assi, Adolphe Alphonse
- Assi, Adolphe Alphonse
- Assing, Rosa Ludmilla
- Assy → Assi, Adolphe Alphonse
- Asten, Carl von
- Aster, Ernst Ludwig von
- Aster, Friedrich Ludwig
- Astley, Philip
- Aston
- Aston
- Aston, James Jones
- Astorga, Vicente Joaquín Osorio de Moscoso, marqués de
- Athanasios der Große
- Athenaeus →
- Athenagoras
- Athenaios
- Athene
- Atherley →
- Atkinson
- Attila
- Attwood, Charles
- Attwood, Matthias
- Attwood, Thomas
- Au, Juljusz
- Auber, Daniel François Esprit
- Aubineau, Léon
- Aubry, Hector Émile
- Audiganne, Armand
- Audorf, Jakob
- Auer, Ignaz
- Auerbach, Berthold eigtl. Moses Baruch Auerbach
- Auerswald, Rudolf von
- Augeas →
- Augeias
- Augier, Marie
- August II. (August der Starke)
- August der Jüngere
- Augusta von Sachsen-Weimar-Eisenach
- Augustenburg
- Augustenburger siehe Friedrich, Prinz von Schleswig-Holstein-Sonderburg-Augustenburg
- Augustinus von Hippo (lat. Aurelius Augustinus)
- Augustus → Iulius Caesar Octavianus Augustus, Gaius
- Augustus II →
- Augustus siehe Iulius Caesar Octavianus Augustus, Gaius
- August III.
- Aulivier, A.
- Aulivier, E.
- Aulois
- Aumale, Henri Eugène Philippe Louis d'Orléans, duc d'
- Aupick, Joseph Jacques
- Aurelius Probus, Marcus
- Aurelius Valerius Diocletianus, Gaius
- Aurelle de Paladines, Louis marquis d'
- Autemarre d’Erville, Charles François Xavier
- Auterac, F.
- Avaux, Jean Antoine, comte d’
- Aveling, Edward Bibbins
- Avianus
- Aviolat, Marc
- Avogadro, conte di Quaregna e Cerreto, Amedeo
- Avoine, Maxime V.
- Avrial, Augustin Germain
- Axton
- Ayamans, José de Togores, conde de
- Ayerbe
- Ayguals de Izco, Wenceslao
- Ayllón Alonso, Mateo Miguel
- Aymerich, José
- Ayres, William
- Aytona, Guillen Ramón de Moncada, marqués de
- Azamat-Batuk → Thieblin, Nicolas Léon
- Azanza, Miguel José de
- Azeglio Tapparelli, Massimo d’
- Azelia
- Azémar, Léopold Michel Martial d’
- Aznáres Navarro, José
- Azpiroz, Francisco Javier de, conde de Alpuente, vizconde de Begis
- Aëtius, Flavius
- A’Court, Sir William