Menander was a first-century CE Samaritan gnostic, magician and a leader of the Simonians following the death of his master and instructor, Simon Magus, who was in Rome during the reign of Emperor Claudius. He is mentioned in the works of Irenaeus, Tertullian and others. Justin Martyr is the oldest source of knowledge about Menander after he met some of the devoted Menandrians in their old age. Justin suggested that Menander was born in Cappareteia and established a school in Antioch where he announced himself the messiah and vowed to defeat the angels that were keeping the world in captivity, possibly through exorcism.