Maurontius of Douai was a 7th-century Benedictine abbot and nobleman born in Ponthieu. After spending his youth at the court of King Clovis II, he inherited significant estates following his father's death in 652. Influenced by a sermon regarding worldly vanities, he abandoned a planned marriage to pursue a religious life. He eventually founded the monastery at Breüil on his Merville estate, where he served as the first abbot, and later managed the community at Marchiennes.