Peter or Petrus was the reputed son of Munichis and brother of one Ursus. Paul the Deacon

Paul the Deacon

Paul the Deacon , also known as Paulus Diaconus, Warnefred, Barnefridus and Cassinensis, , was a Benedictine monk and historian of the Lombards.-Life:...

 records that Munichis died in the same battle as Ferdulf, Duke of Friuli

Ferdulf of Friuli

Ferdulf, originally from Liguria, was the Duke of Friuli very briefly in 705. Paul the Deacon accused him of using "trickery" to seize the duchy after the death of Duke Ado.He was said to have desired "the glory of a victory over the Slavs"...

, and that his son Peter and Ursus later became dukes of Friuli

Duchy of Friuli

The Duchy of Friuli was one of the great territorial Lombard duchies, the first to be established. It was an important buffer between the Lombard kingdom of Italy and the Slavs...

 and Benevento

Duchy of Benevento

The Duchy and later Principality of Benevento was the southernmost Lombard duchy in medieval Italy, centred on Benevento, a city central in the Mezzogiorno. Owing to the Ducatus Romanus of the popes, which cut it off from the rest of Lombard Italy, Benevento was from the first practically...

 respectively. The date of Peter's reign is unknown, but has been hypothesised as following that of Aistulf

Aistulf

Aistulf was the Duke of Friuli from 744, King of Lombards from 749, and Duke of Spoleto from 751. His father was the Duke Pemmo.After his brother Ratchis became king, Aistulf succeeded him in Friuli. He succeeded him later as king when Ratchis abdicated to a monastery...

 or Anselm

Anselm, Duke of Friuli

Saint Anselm of Friuli, O.S.B., was a medieval abbot, and later canonized, originally a Lombard nobleman. He was the first abbot of Nonantola....

 in 756 or 751 and lasted until the Siege of Pavia

Siege of Pavia

The Siege or Battle of Pavia was fought in 773–774 in what is now northern Italy, near Ticinum , and resulted the victory of Franks under Charlemagne against the Lombards under king Desiderius.-Background:...

.

Sources

• Paul the Deacon
  Paul the Deacon
  Paul the Deacon , also known as Paulus Diaconus, Warnefred, Barnefridus and Cassinensis, , was a Benedictine monk and historian of the Lombards.-Life:...
  
  . Historia Langobardorum.