Background
He was the eldest son of Duke Theodo of Bavaria and Folchaid. He was first associated with his father as duke in 702, ruling from Salzburg.
He was the eldest son of Duke Theodo of Bavaria and Folchaid. He was first associated with his father as duke in 702, ruling from Salzburg.
Sometime before 715, the division was given, but whether territorial or coregent is not known. In that scenario, Theodbert probably had his seat at Salzburg, as since 702. Theodbert also provided military help to Ansprand and Liutprand 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.
His father did have him swear to always defend Rupert of Salzburg when he transferred the government to Theodbert.