Floyd John, an English Jesuit, was born in Cambridgeshire. He became a Jesuit on the Continent in 1593, and returned to England as a missionary. He was afterwards banished, and was employed by his superiors to teach polite literature and divinity at St. Omer and Louvain. The time of his death is not known. He was involved in controversies with Chillingworth, Antonius da Dominis, Crashaw, Sir Edward Hobby, and other Protestants, in which he assumed the names of Daniel a Jesu, Hermannus Laemelius, and Annosus Fidelis Verimontanus. Under these names he wrote Synopsis Apostasiae M.A. de Dominis (Antwerp, 1617, 8vo): — Detectio Hypocrisis M. A. de Dominis (1619, 8vo):— The Church Conquerant over human Wit, against Chillingworth (St. Omer, 1631, 4to):— The Total Suum, against the same (1639, 4to):— Answer to William Crashaw (1612, 4to):— A Treatise of Purgatory, in answer to Sir Edward Hobby (1613). — Alegambe, De Script. Frat. Jesu; Hook, Eccl. Biog. 5:154.