Audoin was a 7th-century Frankish bishop and courtier who served the Merovingian dynasty. Born in Sancy-les-Cheminots in 609, he was educated at Saint-Médard de Soissons and later held the position of referendary for King Dagobert I. After his ordination as a priest in 634, he co-founded Rebais Abbey and spent a year serving as a missionary in Spain. He eventually became the Bishop of Rouen in 641, where he acted as an influential advisor to Queen Bathilde.