| [A3788] | Pieter van der Aa (1659 - 1733) | person | printer |
| [A715] | Hans von Aachen (1552 - 4 March 1615) | person | painter |
| [A2897] | Abbey of St Nikola in Passau | corporate actor | |
| [A2918] | Abd al-Rahman al-Sufi (7 December 903 - 26 May 986) | person | represented actor |
| [A1897] | Abdalonymus (died 312 BCE : fl. 332 BCE - 332 BCE) | person | represented actor |
| [A1923] | Abisares, king of Abhira (died 325 BCE) | person | represented actor |
| [A1894] | Abistamenes (died after 333 BCE) | person | represented actor |
| [A1904] | Abulites (fl. 336 BCE - 324 BCE) | person | represented actor |
| [A3] | Giulio Accolti (fl. 1566 - 1571) | person | printer |
| [A1640] | Vincenzo Accolti (died 1597 : fl. 1566 - 1597) | person | printer |
| [A3465] | Cristóbal Acosta (ca 1515 - ca 1592) | person | author |
| [A2645] | Claudio Acquaviva (14 September 1543 - 31 January 1615) | person | recipient |
| [A1067] | Adalbert of Prague (ca 956 - 23 April 997) | person | represented actor |
| [A122] | Hans Adam (ca 1496 - 1568) | person | printer |
| [A2616] | Michael Adam (16th c.) | person | translator |
| [A2553] | Daniel Adam of Veleslavín (31 August 1546 - 18 October 1599) | person | printer |
| [A1689] | Clement Adams (ca 1519 - ca 1587) | person | print publisher |
| [A3723] | Hans Adelhauser (ca 1513 - 1578) | person | designer |
| [A2277] | Adolf (King of the Romans) (ca 1255 - 2 July 1298) | person | represented actor |
| [A3152] | Adrian IV (Nicholas Breakspear) (ca 1100 - 1 September 1159) | person | represented actor |
