| [A2012] | Sigismund of Burgundy (470/480 - 524) | person | represented actor |
| [A2740] | Carlo Sigonio (ca 1524 - 12 August 1584) | person | translator |
| [A526] | Joanna Sikorska | person | author |
| [A1159] | Jonas Silber (fl. 1572 - 1589) | person | printmaker |
| [A1678] | Johann Gustav Silberrad | person | |
| [A3197] | Silverius (died 2 December 537) | person | represented actor |
| [A3567] | Gabriel Simeoni (25 July 1509 - 1575) | person | |
| [A2092] | Theophylact Simocatta (ca 570 - ca 640) | person | author |
| [A1073] | Simon of Trent (1472 - March 1475) | person | represented actor |
| [A1574] | Simonides of Ceos (ca 556 BCE - ca 468 BCE) | person | represented actor |
| [A584] | Johann Singriener (ca 1480 - 1545) | person | print publisher, printer |
| [A3196] | Siricius (334 - 26 November 399) | person | represented actor |
| [A746] | Guglielmo Sirleto (1514 - 6 October 1585) | person | |
| [A7] | Teofil Siudy | person | editor |
| [A3195] | Sixtus I (died 126 or 128) | person | represented actor |
| [A3194] | Sixtus II (died 6 August 258) | person | represented actor |
| [A3193] | Sixtus III (died 18 August 440) | person | represented actor |
| [A3192] | Sixtus IV (Francesco della Rovere) (21 July 1414 - 12 August 1484) | person | represented actor |
| [A1057] | Sixtus V (Felice Piergentile) (13 December 1521 - 27 August 1590) | person | represented actor |
| [A2135] | Skalich (Scaliger, Skalić) family | corporate actor | represented actor |
