Baring-Gould’s sources: Greven and Molanus in their additions to Usuardus, the Belgian and Gallican and Benedictine Martyrologies. Authority An account of him in the life of S. Rictrudis, his mother, by Hucbald, abbot of Elnone. See May 12th.] Adalbald, and his saintly wife Rictrudis, were the parents of Maurontius. His father was murdered in Perigord, and is numbered among the blessed.1 His S. Mourontius.

…sisters Clotsendis (June 30th), Eusebia (March 16 th), and Adalsendis (Dec. 24th), are numbered among the saints. Maurontius was baptized by S. Richarius (Riquier) when on a visit to Adalbald and Rictrudis. When the saintly priest was mounted on his horse at the door, and about to leave, Rictrudis brought the babe put, and Richarius, stooping in his saddle, took the little one in his arms to kiss it. But something frightened the horse, which reared and plunged, and the babe fell into the grass. Pi evidentially it was unhurt, and when the mother rushed to pick it up, the child crowed and extended its arms to her. Maurontius spent his youth at court, but at last resolved to quit the world like his mother and his sisters, and live to God alone in the peaceful cloister. He visited Marchiennes and informed his mother of his intention. She was uneasy, fearing lest his young mind should change, and then sigh for the life in the world he had so rashly deserted. She consulted S. Amandus, and he bade her and the young man hear mass, and pray God to guide them aright in choosing a course of life for Maurontius. Then he vested himself, and the tapers were lit by the youth, who served him as he said mass. Now all three lifted up their prayer to God that He would show if He had chosen the boy, and during the sacrifice through the little window came a summer bee, flying down the ray of light that penetrated into the chapel, and the bee flew thruming thrice round the head of Maurontius. Then Amandus took it for a sign, and he set apart the youth for the religious life. But, though ordained, he must needs return to the palace, and there, as high honour, to him was given to hold the regal orb of gold, and afterwards King Thierri gave him his signet and constituted him his secretary.

Maurontius built the abbey of Breuil on his own property at the confines of Artois and Flanders, on the river Lys. There he received S. Amatus when driven from his see of Sens [a bishop’s “see” is his diocese, named from his seat (Latin sedes)] by the king. He died when on a visit to Marchiennes, where his sister Clotsendis was abbess after her mother's death, and over which Maurontius exercised supervision, according to dying request of Rictrudis. His relics [the bodily remains of a saint, or objects they used, kept with honor] at Douai, of which city he is patron; at Margival, near Soissons, is a fountain dedicated to him; an object of pilgrimage, at Levergies, is a small relic, and a hill once crowned by a statue of him destroyed at the revolution, but still the object of pilgrimage.