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| ʿAbd al-Malik b. Marwān | 685 | 705 | Umayyads | ||
| Adaloald | 616 | 626 | Lombards | ||
| Agila II | 711 | 714 | Visigoths | ||
| Agilulf | 591 | 616 | Lombards | ||
| Aistulf | 749 | 756 | Lombards | ||
| Alahis | 688 | 689 | Lombards | ||
| Alboin | 565 | 572 | Lombards | ||
| Aldfrith, king of the Northumbrians | 685 | 704 | English rulers | ||
| Al-Walīd b. ʿAbd al-Malik | 705 | 715 | Umayyads | ||
| Anastasios I | 491 | 518 | Eastern Roman Empire | ||
| Anastasios II | 713 | 715 | Eastern Roman Empire | ||
| Ansprand | 712 | 712 | Lombards | ||
| Anthemius | 467 | 472 | Western Roman Empire | ||
| Arcadius | 395 | 408 | Eastern Roman Empire | ||
| Ardashir I | 224 | 240 | Sasanians | ||
| Ardashir II | 279 | 283 | Sasanians | ||
| Ardashir III | 629 | 630 | Sasanians | ||
| Arioald | 626 | 636 | Lombards | ||
| Aripert I | 653 | 661 | Lombards | ||
| Aripert II | 701 | 712 | Lombards |