Diodati, a Calvinistic theologian, born at Lucca; was taken while a child with his family to Geneva; distinguished himself there in the course of the Reformation as a pastor, a preacher, professor of Hebrew, and a professor of Theology; translated the Bible into Italian and into French; a nephew of his was a school-fellow and friend of Milton, who wrote an elegy on his untimely death (1576-1614).