He who from whom the Socinians derive their name, was born, in 1539, at Sienna, and was for a considerable period in the service of the grand duke of Tuscany; after which he went to study theology, at Basle. The result of his studies was the adoption of those anti-Trinitarian doctrines, which his uncle Lelio Socinus is believed also to have professed. Faustus settled in Poland, gained many followers, endured much persecution, and died in 1604.