A magician who held people spellbound in Samaria (Acts 8: 9 ff.). He was baptized by Philip (Acts 8: 13), after which he in turn was no less astonished by Philip's signs and wonders, and was filled with such envy that when Peter arrived Simon sought to obtain a similar power by a financial deal, which Peter repudiated (Acts 8: 20). Despite his repentance he acquired a bad reputation. He was regarded as a Gnostic leader and the offence of ‘simony’ is named from him.