St. Philibert of Jumièges (c. 608–684) was an abbot and monastic founder, particularly associated with Jumièges Abbey (he is also called Philibert of Tournus). He was born in Gascony as the only son of a courtier of Dagobert I and was educated by Saint Ouen. Philibert later entered the monastery of Rebais as a monk, and was promoted to abbot, but soon resigned the position.
He left and spent some time traveling around various monasteries studying their Rules and constitutions in preparation for the foundation of his own abbey. In 654, Philibert received a gift of land from Clovis II on which he founded Jumièges Abbey. He drew up a Rule based on his studies for this and for his later foundations, drawing on several earlier Rules, including those of Benedict, Columbanus, Macarius and Basil the Great.
For a time Philibert lost the favor of king and was exiled. He withdrew to Poitiers and near Heriou founded the monastery of Noirmoutier, whereupon Ansoald, bishop of Poitiers, put his own foundation of Luçon Abbey under Philibert's charge as well. When he regained the favor of his patrons, he founded other houses, including the monastery of Cunaut and the nunnery at Pavilly.
Philibert died and was buried at Heriou, but in 836 the monks of Noirmoutier abandoned their home in the face of the Viking attacks to seek refuge on the mainland, in 875 finally settling with the relics of Philibert in the abbey at Tournus named in his honour, where the great church of St Philibert at Tournus still stands. His feast day is 20 August. The filbert, or hazelnut, is said to have been named for him, since it ripens about August 20 in England.