Constantinus, The name of diuerse Emperours: The most excellent was sonne of Constantius, (a noble and valiaunte prince, felowe in the Empyre with Matiminus) and of Helens, a woman borne in Englande, then called Britaine. After he had attained the Monarchie, he dayly most studiously laboured to augment the faith of Christ: notwithstãding in hys time were diuerse heresies, and horrible contentions among the Bishops, which he did either dissolue, or at the least way, reuerently moderate with a wondersul tÊperance. He raigned xxx, yeres, and was buried in Constantinople. He died in the yeare of our Lord. 330.
Lewis and Short: Latin dictionary
Constantīnus, i, m., C. Flavius Vaferius Claudius Constantinus, Constantine, a well-known Roman emperor, born A. D. 274, died A. D. 323, Eutr. 10, 2 sqq.; Lact. Mort. Pers. 18 sqq.; Amm. 21, 10, 8.—Hence, Constantīnĭānus, a, um, adj., of or pertaining to Constantine: genus, Amm. 27, 5, 1: lavacrum, id. 27, 3, 8.