Theodbert of Bavaria
Encyclopedia
Theodbert (c. 685 – c. 719) was the duke of Bavaria in some capacity or other from 702 to his death. He was the eldest son of Duke Theodo of Bavaria
Theodo of Bavaria
Theodo also known as Theodo V and Theodo II, was the Duke of Bavaria from 670 or, more probably, 680 to his death.It is with Theodo that the well-sourced history of Bavaria begins...

 and Folchaid. He was first associated with his father as duke in 702, ruling from Salzburg
Salzburg
-Population development:In 1935, the population significantly increased when Salzburg absorbed adjacent municipalities. After World War II, numerous refugees found a new home in the city. New residential space was created for American soldiers of the postwar Occupation, and could be used for...

. In 711, his younger brother Theobald
Theobald of Bavaria
Theobald was the duke of Bavaria from at least 711, when his father Theodo associated him with his rule at Passau or Salzburg. He was the second son of Theodo and Folchaid....

 was co-ruling as well and his father was making plans for a fourfold division of the duchy on his death. Sometime before 715, the division was given, but whether territorial or coregent is not known. If the former, the dioceses set up by Theodo probably corresponded to the duchies of his sons. In that scenario, Theodbert probably had his seat at Salzburg, as since 702.

His father did have him swear to always defend Rupert of Salzburg
Rupert of Salzburg
Rupert of Salzburg is a saint in the Roman Catholic and Eastern Orthodox churches and a founder of the Austrian city of Salzburg...

 when he transferred the government to Theodbert. Theodbert also provided military help to Ansprand
Ansprand
Ansprand was king of the Lombards briefly in 712. Before that he was the duke of Asti and regent during the minority of Liutpert . He was defeated at Novara by Raginpert and exiled during the subsequent war over the succession, fleeing to the court of Theudebert, duke of Bavaria, in 702.In 711,...

 and Liutprand
Liutprand, King of the Lombards
Liutprand was the King of the Lombards from 712 to 744 and is chiefly remembered for his Donation of Sutri, in 728, and his long reign, which brought him into a series of conflicts, mostly successful, with most of Italy. He profited by Byzantine weakness to enlarge his domains in Emilia and the...

 in their reconquest of Italy in 712.

After Theodo's death, the four brothers warred with each other, but all were dead by 719 save Grimoald, who thereafter ruled alone until his own death. Theodbert had married Regintrude and had a son and a daughter: Hugbert
Hugbert of Bavaria
Hugbert of the Agilolfings was duke of Bavaria from 725 to 736 . He was son of the duke Theudebert and Regintrud, the probable daughter of the Seneschal Hugobert and Irmina of Oeren....

, the only grandson of Theodo II, who inherited the duchy united after Grimoald's death, and Guntrude, who married Liutprand.
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