Sevērus, Flavius Valerius in Harper's Dictionary

A Roman emperor (A.D. 306-307). He was proclaimed Caesar by Galerius in 306, and was soon afterwards sent against Maxentius, who had assumed the imperial title at Rome. The expedition, however, was unsuccessful; and Severus, having surrendered at Ravenna, was taken as a prisoner to Rome, and compelled to put an end to his life. See Maxentius.