Prince Judicael survived the persecutions of the reign of his brother, Prince Haeloc of
Domnonée, and was brought out of hiding in a
monastery on the latter’s death. He set up his palace in the Forest of Paimpont. It is recorded that:
"Terror of his name alone was sufficient to keep evil men from violence, for God, who watched over
him without ceasing, had made him brave amd mighty in battle; it happened more than once that with
the aid of the Almighty he was able to put whole troops of the enemy to flight by the strength of his sword-arm alone"
He defeated the Franks twice in battle and, despite the Breton Prince's reputation, in
AD 635 King Dagobert
of the Franks, sent St. Eligius to demand his submission if he wanted to avoid full scale invasion. Judicael
was a practical man, and quickly travelled to Dagobert's Court ion Paris to recognise him as his overlord.
Thus a lasting peace was concluded between the two. He was a pious King who founded the Abbey of
Paimpont and helped endow the monastery of St. Meven at Gaël to where, upon his abdication, he retired.
The principality was left in the hands of his brother, Judoc.