Wikipedia
The Agilolfings were a noble family that ruled the Duchy of Bavaria on behalf of their Merovingian suzerains from about 550 until 788. A cadet branch of the Agilolfings also ruled the Kingdom of the Lombards intermittently from 616 to 712. They are mentioned as the leading dynasty in the Lex Baiuvariorum (c. 743). Their Bavarian residence was at Regensburg.
The dynasty's eponymous ancestor is Agilulf (Proto-Germanic Agilwulfaz), a semi-legendary prince of the Suebi and descendant of Hermeric, the 5th-century Suevic king of Galicia, possibly identical with one Agilulf, a steward of the Visigothic king Theoderic II, who was executed in 457.
The first duke identified with the Agilofing line in German historiography is Garibald I (Gariwald). However, doubt has been cast on Garibald's membership in the Agilofing family in modern scholarship, which makes Tassilo I (r. 591–610) the first ascertained member of the dynasty.
The Agilolfings had close ties to the Merovingians. Garibald I himself married Waldrada, the widow of Merovingian king Theudebald, in 555, after her marriage to Lothair I was annulled on grounds of consanguinity. As they had their fate intertwined with the Merovingian dynasty, they opposed the rise of the Carolingian majordomos, who finally deprived the Agilolfings of their power.