The Assassination of Otto and the Rise…

643 CE

The Assassination of Otto and the Rise of Grimoald the Elder (c. 640 CE)

After the death of Pepin of Landen in 639 or 640 CE, Otto, the son of Uro, a domesticus in the court of Dagobert I, successfully challenges Grimoald’s bid for the mayoralty of Austrasia. However, his tenure as Mayor of the Palace is short-lived, as he is murdered at the request of Grimoald the Elder, securing Grimoald’s rise to power.

1. Otto’s Background and His Role in Sigebert III’s Court

Otto had been raised alongside Sigebert III, the young King of Austrasia, and later served as his baiolos (bailiff or guardian).
When Pepin of Landen died, Otto initially emerged as his successor, blocking Grimoald’s attempt to claim the mayorship.
His position in the Austrasian court, combined with his close relationship with Sigebert III, made him a serious rival to Grimoald’s ambitions.

2. The Assassination of Otto and the Role of Leuthari II

Seeking to eliminate Otto, Grimoald enlists the support of Leuthari II, Duke of Alamannia, who arranges for Otto’s murder.
With Otto dead, Grimoald secures his succession as Mayor of the Palace, gaining control over the Austrasian court.

3. The Mysterious Alamannic Duchy and Leuthari II

The exact nature of Leuthari II’s duchy is uncertain, as another Alamannic duke, Gunzo, is also mentioned around the same time.
Possible explanations:
- Leuthari and Gunzo could be co-rulers of the same Alamannic territory.
- There may have been two separate duchies within Alamannia, with different noble factions.
- The Duchy of Alsace, under Duke Gundoin, may also have been partially Alamannic, complicating the regional power structure.

4. The Consolidation of Power Under Grimoald the Elder

With Otto eliminated, Grimoald takes full control as Mayor of the Palace of Austrasia, securing the most powerful political office in the kingdom.
His close relationship with King Sigebert III allows him to manipulate royal authority, further diminishing Merovingian power.
This sets the stage for Grimoald’s later attempt to install his own son on the throne, directly challenging Merovingian legitimacy.

Conclusion: A Step Toward Aristocratic Rule

The murder of Otto and the rise of Grimoald the Elder are key moments in the gradual transfer of power from the Merovingian kings to the Mayors of the Palace. This event highlights:

The increasing role of political assassinations in Frankish aristocratic struggles.
The complex political structure of Alamannia, where multiple dukes may have shared power.
The accelerating decline of Merovingian royal authority, as powerful nobles competed for control over the Frankish realm.

Grimoald’s success in securing the mayorship marks the continued rise of noble dominance, paving the way for the eventual Carolingian takeover of the Frankish kingdom.