Ansbert of Rouen was a 7th-century Frankish monk, abbot, and bishop who served the Merovingian court before entering religious life. Born in Chaussy, he initially held high-ranking positions as a chancellor and referendary for King Clotaire III. Following the king's death in 673, he joined the Benedictine order and eventually led Fontenelle Abbey as abbot. He later became the archbishop of Rouen, though he was eventually removed from this position and died in exile at Hautmont Abbey.