Ambrosios of Alexandria was a third-century theologian and deacon from Alexandria who became a close associate of the teacher Origen. Originally following Valentinian and Marcionist beliefs, he transitioned to different theological views through Origen's instruction. As a wealthy nobleman, he supported his mentor's scholarly work by providing necessary books and secretaries. He is noted for encouraging the composition of several major biblical commentaries and was eventually recognized as a confessor following the persecutions under Maximinus Thrax.