Adalgisel

Adalgisel or Adalgis (Adalgyselus ducis in contemporary Latin) was a Frankish duke and the mayor of the palace of Austrasia. He assumed that office in December 633 or January 634 at the same time that Sigebert III assumed the kingship. Along with Cunibert, Bishop of Cologne, he acted as regent for the young king. Adalgisel, Cunibert, and Sigebert were all appointed by Dagobert I.

Adalgisel led the Austrasian army against the Thuringii sometime around 639, but was defeated by Duke Radulf. Not long after, he ceased to be duke and was replaced by Pepin of Landen, probably following the nearly concurrent death of Dagobert. Though he lost his office, there is no evidence he died and some charters referring to a person of the same name may refer to him, thus indicating his survival long after the fact.

He left a son Bobo, who had accompanied him into battle against the Thuringii, and was later Duke of Auvergne.

Sources

• Foundation for Medieval Genealogy. Merovingian Nobility.
• Wallace-Hadrill, J. M., translator. The Fourth Book of the Chronicle of Fredegar with its Continuations. Greenwood Press: Connecticut, 1960.