Theudebert was the eldest son of King Chilperic I

Chilperic I

Chilperic I was the king of Neustria from 561 to his death. He was one of the sons of the Frankish king Clotaire I and Queen Aregund....

 of Soissons

Soissons

Soissons is a commune in the Aisne department in Picardy in northern France, located on the Aisne River, about northeast of Paris. It is one of the most ancient towns of France, and is probably the ancient capital of the Suessiones...

, through his first wife Audovera

Audovera

Audovera was the first wife or mistress of Chilperic I, king of Neustria.They had four children.*Theudebert, died in the war of 575*Merovech , married the widow Brunhilda and became his father's enemy*Clovis, assassinated by Fredegund in 580...

. Theudebert was given command of Soissons in the early years of his father's reign. When his father precipitated a war with his brother Sigebert I

Sigebert I

Sigebert I was the king of Austrasia from the death of his father in 561 to his own death. He was the third surviving son out of four of Clotaire I and Ingund...

 of Austrasia

Austrasia

Austrasia formed the northeastern portion of the Kingdom of the Merovingian Franks, comprising parts of the territory of present-day eastern France, western Germany, Belgium, Luxembourg and the Netherlands. Metz served as its capital, although some Austrasian kings ruled from Rheims, Trier, and...

, Sigebert marched on his capital and took the city, capturing and imprisoning Theudebert. He was out of prison a year later. On the death of King Charibert I

Charibert I

Charibert I was the Merovingian King of Paris, the second-eldest son of Chlothar I and Ingund. His elder brother was Gunthar, who died sometime before their father's death....

 of Paris

Paris

Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

 in 567, Theudebert invaded Austrasia and razed many cities. In 575, Theudebert was killed in battle by Guntram Boso in the civil war between Chilperic, Sigbert, and Guntram

Guntram

Saint Guntram was the king of Burgundy from 561 to 592. He was a son of Chlothar I and Ingunda...

, king of Burgundy

King of Burgundy

The following is a list of the Kings of the two Kingdoms of Burgundy, and a number of related political entities devolving from Carolingian machinations over family relations.- Kings of the Burgundians :...

.