Dagobert (dăg' ō-bêrt), the name of several of the Merovingian kings of France. The best known is Dagobert I, who ruled France from 628 to 638. He was a vigorous monarch, but debauched in his private life,. His court almost equaled in magnificence that at Constantinople. His most noteworthy act was to revise and publish the old national statutes, known as the Salic and the Ripuarian laws.