Constantius,Constantius Chlorus, father of Constantine, emperor 305–306. grandson of the brother of that best of emperors Claudius,Claudius II.; his mother was Claudia, daughter of Crispus, brother of Claudius II; cf. Eutr. ix. 22; Hieron. a. Abr. 2307. was first one of the emperor’s bodyguard, then a tribune, and later, governor of Dalmatia.Under the emperor Carus, who wished to make him Caesar in place of his own brother Carinus. With Galerius he was appointed Caesar by DiocletianIn 292. ; for he put away his former wife Helena and married Theodora, daughter of Maximianus, by whom he afterwards had six children,Three sons: Dalmatius, Julius Constantius, and Hannibalianus; and three daughters: Constantia, Anastasia, and Eutropia. brothers of Constantine. But by his former wife Helena he already had a son Constantine, who was later the mightiest of emperors.