Constantius Chlorus — Chambers's Encyclopaedia

Constantius Chlorus, nephew of the emperor Claudius II., became Cæsar in 292 A.D., received Britain, Gaul, and Spain as his government, and after re-establishing Roman power in Britain and defeating the Alemanni, became one of the two Augustuses in 305, but died at York in 306. Constantine the Great was his son.—(2) CONSTANTIUS, third son of Constantine, was Roman emperor, 337-361 A.D. He fought with the Persians; and after the death in 350 of his brother Constans (who in 340 had defeated their elder brother Constantine), became sole emperor till his death in 361.