The Merovingian dynasty (/ˌmɛrəˈvɪndʒiən/) was the ruling family of the Franks from around the middle of the 5th century until Pepin the Short in 751. They first appear as "Kings of the Franks" in the Roman army of northern Gaul. By 509 they had united all the Franks and northern Gallo-Romans under their rule. They conquered most of Gaul, defeating the Visigoths (507) and the Burgundians (534), and also extended their rule into Raetia (537). In Germania, the Alemanni, Bavarii and Saxons accepted their lordship. The Merovingian realm was the largest and most powerful of the states of western Europe following the breakup of the empire of Theodoric the Great.
The dynastic name, medieval Latin Merovingi or Merohingii ("sons of Merovech"), derives from an unattested Frankish form, akin to the attested Old English Merewīowing, with the final -ing being a typical Germanic patronymic suffix. The name derives from Salian King Merovech, who is at the center of many legends. Unlike the Anglo-Saxon royal genealogies, the Merovingians never claimed descent from a god, nor is there evidence that they were regarded as sacred.