The biography of St. Tudgual, composed after the middle of the ninth century, relates that King Childebert had him consecrated Bishop of Tréguier; but Louis Duchesne argued that it was King Nomenoe who, in the middle of the ninth century, raised the monastery of Tréguier to the dignity of an episcopal see.
Upon his father's death, Theudebert had to fight both his uncles Childebert and Clotaire to inherit his father's kingdom.
King Childebert was urged by the pope to assist Virgilius in exterminating simony from the Churches of Gaul and Germania.
Judael gathered an army supported by Childebert's brother Chlothar I and killed Conomor in a battle in the Monts d'Arrée near Le Relecq, Plounéour-Ménez, which is named from the relics of the victims.
Despite his revolt, which saw him replaced by Leudegisel (585) and Nicetius (587), he was reconciled with Childebert and formally restored to favour on 28 November 587.
When that monarch attempted to assassinate him, Pronimius then fled back to Gaul, and eventually made his way to the court of the Frankish king Childebert, who then appointed Pronimius bishop of Vence.