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| Al-Dahhak ibn Qays al-Shaybani | 745 | 746 | Kharijites | ||
| Alboin | 565 | 572 | Lombards | ||
| Alaric II | 484 | 507 | Visigoths | ||
| Alahis | 688 | 689 | Lombards | ||
| Aistulf | 749 | 756 | Lombards | ||
| Agilulf | 591 | 616 | Lombards | ||
| Agila II | 711 | 714 | Visigoths | ||
| Aethelbald of Mercia | 716 | 757 | Kingdom of the Mercians | ||
| Aelia Verina | 457 | 474 | Eastern Roman Empire | ||
| Aelia Pulcheria | 408 | 453 | Eastern Roman Empire | ||
| Aelia Flaccilla | 378 | 386 | Roman Empire | ||
| Aelia Eudoxia | 395 | 404 | Eastern Roman Empire | ||
| Aelia Eudocia | 420 | 450 | Eastern Roman Empire | ||
| Aelfwald of East Anglia | 713 | 749 | Kingdom of the East Angles | ||
| Adaloald | 616 | 626 | Lombards | ||
| Abul ‘Abbas as-Saffaḥ or Al-Mansur | 751 | 775 | Abbasids | ||
| Abul ‘Abbas as-Saffaḥ | 750 | 754 | Abbasids | ||
| Abu Muslim Abd al-Rahman ibn Muslim al-Khurasani | 745 | 750 | Abbasids | ||
| Abu Ja'far Abdallah ibn Muhammad al-Mansur | 754 | 775 | Abbasids | ||
| ʿAbd al-Malik b. Marwān | 685 | 705 | Umayyads |