Catholic Encyclopedia (1913)/Adeodatus
Adeodatus, son of St. Augustine, Bishop of Hippo, b. 372; d. 388. St. Augustine was not converted to the Faith until he was thirty-two years of age. At seventeen he contracted an illicit relation with a young woman and Adeodatus was born of this union. Augustine, in his delight, named him "Adeodatus", i.e. the "gift of God". When Augustine went to Rome, and, later, to Milan, this young woman and the child went with him, and she and Augustine continued their guilty relations. The young Adeodatus was the pride and hope of his parents, and possessed of an extraordinary mental endowment. Bound by this natural enthralment, Augustine would not bring himself to break from it; and as the sinful union was an obstacle to his receiving the gift of faith, St. Monica, his mother, desired him to marry the mother of his child, feeling that then his mind would be enlightened by grace. Just as the name of the mother of Adeodatus has never been told, so also there has never been given the reason why she and Augustine did not marry at this juncture, though there was evidently some strong if not insurmountable one. Finally they separated. "She was stronger than I", wrote St. Augustine, "and made her sacrifice with a courage and a generosity which I was not strong enough to imitate." She returned to Carthage, whence she had come, and the grace which had led her to sacrifice the object of her affection further impelled her to bury herself in a monastery, where she might atone for the sin which had been the price so long paid for it. She left the brilliant young boy, Adeodatus, with his father. Seeing the wonderful intelligence of his son, Augustine felt a sort of awe. "The grandeur of his mind filled me with a kind of terror", he says himself (De beatâ vitâ, c. vi). Augustine received baptism at the age of thirty-two from the hands of St. Ambrose, the intimate friend of St. Monica and himself. To augment his joy, Adeodatus, Alypius, Augustine's life-long associate, and a number of his closest friends, all became Christians on the same occasion and received baptism together. Monica, Augustine, Adeodatus, who was now fifteen, and a son of Grace, if indeed "the child of my sin", as Augustine had styled him in the bitterness of self-reproach and contrition, together with the loyal Alypius, dwelt together in a villa at Cassiciacum, near Milan. The many conversations and investigations into holy questions and truths made it a Christian Academy, of more exalted philosophy than Plato's. Adeodatus had his full share in many of these learned discussions. He appears as interlocutor in his father's treatise "De beatâ vitâ" (puer ille minimus omnium, that boy, the youngest of them all), and contributed largely to the treatise "De Magistro", written two years later. He appears to have died soon after, in his sixteenth year. (See St. Augustine).
Moberly in Dict. of Christ. Biog., I, 43; Poujoulat, Hist. de St. Augustin, sa vie ses œuvres, etc., 7th ed., 1886; Wolfsgrüber, Augustinus (Paderborn, 1888); Desjardins, Essai sur les confessions de St. Augustin (Paris, 1855).