Ambrose deacon of Alexandria, flourished chiefly about the year 230; he was a man of wealth, and by his wife, Mavella, had many children. For some time he was entangled in the errors of the Valentinians and Marcionites, but Origen brought him to the true faith. With Origen he became closely intimate, and they studied together. He is said to have furnished Origen with seven secretaries, whom he kept constantly at work. Ambrose died about 250, after the persecution of Maximinus, in which he confessed the faith boldly with Protoctetes, a priest of Caesarea in Palestine. His letters to Origen, which St. Jerome commends highly, are lost. The Roman Church commemorates him as confessor on March 17. — Euseb. Ch. Hist. 6, 18; Landon, Eccl. Dictionary, 1, 302.