- , Attila
- , Azelia
- Abad Moreno, Francisco
- Abad y Queipo, Manual
- Abarbanel
- Abarbanel
- Abarbanel
- Abarbanell → Abarbanel,
- Abarca, Joaquín
- Abbas Mirsa
- 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
- Aboreda, Francisco
- About, Edmond François Valentin
- Abraham
- Abril, Juan
- Abt, Christian Gottlieb
- Abu Bakr
- Abuin, Saturnino
- Achates
- Achila
- Achilleus
- Ackermann, Karl
- 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
- 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
- Adelung, Johann Christoph
- Adenan, T.
- Aders → Siebel, Philippine
- Adler, Georg
- Adler, Friedrich
- Adler, Victor
- Adler, Emma (geb. Braun)
- Adlerfelt, Gustaf
- Adolf Brennglas → Glaßbrenner, Adolf
- Adolf Frederik
- Adolf von Nassau
- Adolf VIII. von Holstein-Schauenburg
- Adrian
- Adrien
- Aella
- Aepinus, Franz Ulrich Theodor
- Aeschines →
- Aesop →
- Affre, Denis Auguste
- Afinger, Bernhard
- Afonso VI
- Agamemnon
- Agar, Pedro
- Agassiz, Louis Jean Rodolphe
- Agossa, J.
- Agramante
- Agrippa → Menenius Agrippa,
- Aguado, Alejandro, marqués de las Marismas
- Aguilar, Manuel María de
- Aguirre, José Maria de
- Aguirre, Pedro
- Aguirre y Solarte, José Ventura
- Ahmed Pascha, Fevzi
- 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
- Ailloud, Jean-Alphonse
- Aineias
- Aischines
- Aischylos
- 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, Isidro, conde de Vergara
- 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, Herzog von
- Albedyll, Emil von
- Alberoni, Giulio
- Albert
- Albert eigtl. Alexandre Martin genannt Arbeiter Albert
- Albert von Sachsen-Coburg und Gotha, Herzog zu Sachsen
- Alberts
- Albinus
- Albrecht Friedrich
- Albrecht von Brandenburg-Ansbach
- Albrecht, Prinz von Preußen
- Albrecht V.
- Albrecht VII., der Fromme
- Albuquerque, Afonso de
- Albuquerque, José María, duque de
- Albêca, d'
- Alcalá Galiano, Antonio
- Alcalá Galiano, Antonio
- Alcocer, José María genannt Clearco Ambraciano
- Alcudia, Antonio Saavedra, conde de
- Aldama é Irabien, Juan Antonio, conde de Belascoaín
- Aldovrandi, P.
- Aleksandar Karad’ord’evič
- Aleksandr I
- Aleksandr II
- Aleksandr III
- Aleksandra Fedorovna geb. Charlotte von Preußen
- Aleksandra Nikolaevna
- Alekseev, Nikolaj Aleksandrovič
- Aleksej Michajlovič
- Aleksej Petrovič
- Alembert, Jean Le Rond d’
- Alerini, Charles
- Alexander →
- Alexander, Michael Solomon
- Alexander, Nathaniel
- Alexander, Richard Dykes
- Alexander
- Alexander II.
- Alexander Ludwig Georg Friedrich Emil, Prinz von Hessen und bei Rhein
- Alexander VI.
- Alexander VII.
- Alexander VIII.
- Alexandra
- Alexandros III (Alexander der Große)
- Alexandru Ioan I Cuza
- Alfonso
- Alfonso II,
- Alfonso IX
- Alfonso V
- Alfonso V
- Alfonso VIII
- Alfonso X, el Sabio
- Alfonso XI
- Alfred der Große
- Ali Pascha
- Ali Pascha bin Vuli
- Ali Pascha eigtl. Ludwig Carl Friedrich Detroit
- Alison, Sir Archibald
- Alisov, Petr Ḟedosěevič
- Alkaios
- Allan, William
- Allan, William
- Allemandi, Michele Napoleone
- Allemane, Jean
- Allen, William Philip
- Allen, George
- Allen, George R.
- Allen, William Philip
- Allmann, Julius
- Allonville, Armand Octave Marie, vicomte d’
- Allsop, Thomas
- Almodóvar, Ildefonso Díaz de Ribera, conde de
- Alonso Pérez de Vivero
- Alonso Ruiz Conejares, José
- Alonso de Cuevillas, Hilario
- Alsager, Thomas Massa
- Altenhöfer, August Joseph
- Altgeldt, H.
- Althaus, Friedrich
- Altmann, A.
- Altstaetter, Gustav
- Alvensleben, Gustav von
- Alós, José María, 4. marqués de Alós
- Amarante, Francisco da Silveira Pinto da Fonseca,1 conde de
- Amarillas, Pedro Augustin Girón, 1. duque de Ahumada, marqués de las
- Ambernÿ
- Ambrosius
- Ambrózy, György, Baron
- Ameller, Narciso de
- Amelot de la Houssaye, Abraham Nicolas
- American Philosophical Society
- AmhlaeibhOlafAnlaf → Amlaíb Cuarán ,
- Amiel
- Amlaíb Cuarán
- Ammianus Marcellinus
- Ampelius, Lucius
- Ampère, André Marie
- Amphitryon
- Anaximandros
- Andéchaga, Castor de
- Anderfuhren, W.
- Anders, Carl
- Anders, Heinrich
- Anderson, George
- Anderson, Adam
- Anderson, James
- Anderson, James Andrew
- Anderson, Adam
- Anderson, John Henry
- Andlaw-Birseck, Heinrich Bernhard, Reichsfreiherr von und zu
- Andral, Gabriel
- André, Edith B.
- 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
- Angely, Louis
- Angerstein, Wilhelm
- Anglona, Pedro Alcántare Tellez Girón, príncipe de
- Anielewski, L.
- Anna
- Anna →
- Anna (Anna Ivanovna)
- Anna Pavlovna
- Anna Petrovna
- Anna von Habsburg
- Anna von Österreich
- Annaeus Lucanus, Marcus
- Annaeus Seneca, Lucius, der Jüngere
- Anne
- Anne de Beaujeu, duchesse de Bourbon
- Anne de Bretagne
- Anne d’Autriche
- Anneke, Mathilde Franziska
- Anneke, Carl Friedrich Theodor (auch Fritz Anneke)
- Annexander
- Anrooij, Henriëtte
- Anrooij, Antonie Johann Wouter van
- Anrooij, Sophie van
- Anseele, Edward
- Anselm von Canterbury
- 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, Juan
- Antoine, V.
- Anton Günther
- Antonelli, Giacomo
- Antonini, Emidio
- Antonio Pascual de Borbón
- Antonius der Große
- Apelles
- Aphrodite
- Apollo
- Apollodoros aus Athen
- Apollonios von Rhodos
- Apostata → Iulianus,
- Apostata siehe Iulianus
- Appianus (Appianos)
- Applegarth, Robert
- Appleton, Nathan
- Appleton
- Appleton, William Henry
- Apponyi, Antal, Graf
- 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
- 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
- Armandi, Pietro Damiano
- Armansperg, Joseph Ludwig, Graf von
- 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
- Arnould, Ambroise Marie
- Arnould de Choques
- 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, Anthony, 7th Earl of Shaftesbury
- Ashton, Thomas
- Asplet, Charles
- Asplet, Philippe
- Assarino, Luca
- Assi, Adolphe Alphonse
- Assi, Adolphe Alphonse
- Assing, Rosa Ludmilla
- Assy → Assi, Adolphe Alphonse
- 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
- Athenagoras
- Athene
- Atkinson
- Attwood, Charles
- Attwood, Matthias
- Attwood, Thomas
- Au, Juljusz
- Auber, Daniel François Esprit
- Aubineau, Léon
- Aubry, Hector Emile
- Audiganne, Armand
- Auer, Ignaz
- Auerbach, Berthold eigtl. Moses Baruch Auerbach
- Auerswald, Rudolf von
- Augeas →
- Augeias
- Augier, Marie
- August II., der Starke
- August der Jüngere
- Augusta von Sachsen-Weimar-Eisenach
- Augustenburg
- Augustenburger siehe Friedrich, Prinz von Schleswig-Holstein-Sonderburg-Augustenburg
- Augustus, Gaius Iulius Caesar Octavianus
- Augustus II → August II., der Starke,
- August III.
- Aulivier, A.
- Aulivier, E.
- Aulois
- Aumale, Henri Eugène Philippe Louis d'Orléans, duc d'
- Aupick, Joseph Jacques
- Aurelius Probus, Marcus
- Aurelle de Paladines, Louis marquis d'
- Autemarre d’Erville, Charles François Xavier
- Auterac, F.
- Avaux, Jean Antoine, comte d’
- Aveling, Edward Bibbins
- Aviolat, Marc
- Avogadro, Lorenzo Romano Amadeo Carlo, comte di Quaregna e Ceretto
- Avoine, Maxime V.
- Avrial, Augustin Germain
- Axton
- Ayamans, José de Togores, conde de
- Ayerbe
- Ayguals de Izco, Wenceslao
- Ayllón, 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’
- Azémar, Léopold Michel Martial d’
- Aznares, José
- Azpiroz, Francisco Javier de, conde de Alpuente, vizconde de Begis
- Aëtius, Flavius
- A’Court, Sir William