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| Childeric III | 743 | 751 | Merovingians | ||
| Chilperic I | 561 | 584 | Merovingians | ||
| Chilperic III | 715 | 721 | Merovingians | ||
| Chindasuinth | 642 | 653 | Visigoths | ||
| Chintila | 636 | 639 | Visigoths | ||
| Chlothar I | 511 | 561 | Merovingians | ||
| Chlothar II | 584 | 629 | Merovingians | ||
| Chlothar III | 657 | 673 | Merovingians | ||
| Chlothar IV | 718 | 719 | Merovingians | ||
| Cleph | 572 | 574 | Lombards | ||
| Clovis I | 481 | 511 | Merovingians | ||
| Clovis II | 638 | 657 | Merovingians | ||
| Clovis IV | 691 | 695 | Merovingians | ||
| Constans I | 337 | 350 | Roman Empire | ||
| Constans II | 641 | 668 | Eastern Roman Empire | ||
| Constans II (Western) | 407 | 411 | Western Roman Empire | ||
| Constantine I | 306 | 337 | Roman Empire | ||
| Constantine I or Constans | 306 | 350 | Roman Empire | ||
| Constantine I or Constantine II | 306 | 340 | Roman Empire | ||
| Constantine I or Constantius II | 306 | 361 | Roman Empire |