Socrates of Constantinople
Marina Severa (died before 375) was the Empress of Rome and first wife of Emperor Valentinian I. She was the mother of later Emperor Gratian. Her full name is unknown. Marina Severa is a combination of the two names given in primary sources. Socrates of Constantinople calls her "Severa" while John Malalas, the "Chronicon Paschale" and John of Nikiû name her "Marina".