There was more than one Merovingian King named Dagobert; their relationship was not direct descent, and they are sometimes confused.
|Dagobert (697/8 - 03 Sep or 31 Dec 715)|
|bur. Basilique Saint-Etienne, Choisy-au-Bac|
Dagobert was born about 697-698.  "Dagobertus" is named son of King Childebert III in the Cartulaire of Saint-Bertin. Dagobert succeeded his father in 711 as Dagobert III King of the Franks, under the authority of Pépin d'Herstal, the Carolingian Mayor of the Palace. 
Dagobert III became the Merovingian king of the Franks in 711 and reigned until his death four years later. He succeeded his father as the head of the three Frankish kingdoms—Neustria and Austrasia, unified since Pippin's victory at Tertry in 687, and the Kingdom of Burgundy—in 711, at the age of twelve. Real power, however, still remained with the Mayor of the Palace, Pippin of Herstal, who died in 714. 
Pippin's death occasioned open conflict between his heirs and the Neustrian nobles who elected the mayors of the palace. As for Dagobert himself, the Liber Historiae Francorum reports he died of illness, but otherwise says nothing about his character or actions. 
While attention was focused on combatting the Frisians in the north, areas of southern Gaul began to secede during Dagobert's brief time: Savaric, the fighting bishop of Auxerre, in 714 and 715 subjugated Orléans, Nevers, Avallon, and Tonnerre on his own account, and Eudo in Toulouse and Antenor in Provence were essentially independent magnates. 
The name of King Dagobert III's wife is not known. 
Dagobert died either 3 September or 31 December 715 and was buried at Choisy-au-Bac, near Compiègne, basilique Saint-Etienne.  The Continuator of Fredegar and the Liber Historiæ Francorum both record that he died "after a reign of five years". The Monumenta Epternacensia record that "Dagobertus rex" was killed in 715 "in Cortia silva" and buried "Satiniaco". 
He was succeeded by Chilperic II
King Dagobert III & his wife had one child, Theoderich, born about 712.
In the legend of Makhir of Narbonne, it is Habibai Natronai who becomes the father of Theuderic. While the legend arose as early as 1200, the alternative parenthood of Theuderic has no basis in fact. 
|MEDIEVAL LANDS: A prosopography of medieval European noble and royal families by Charles Cawley © Foundation for Medieval Genealogy & Charles Cawley 2000-2018.|
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