What names that are in use today have Roman origins?

I went looking for a source for Vivian and found several others (Bruun, Christer, and J. C. Edmondson. The Oxford Handbook of Roman Epigraphy):

Thus it is only from recent epigraphic finds that the consuls of 463 (Vivianus), 511 (Felix), and 521 (Valerius) are shown to glory in the names Flavius Antoninus Messala Vivianus (AE 2008, 1764), Arcadius Placidus Magnus Felix (EAOR VI 17.67a-f), and Iobius Philippus Ymelco Valerius (EAOR VI 17.72a-g) respectively, …

Vivian — Vivianus (year 463 cited)
Felix — Felix (year 511 cited)
Philipp/Phillip — Philippus (year 521 cited)

… among others. Clearly, this spans the collapse of the western empire. Also, this Vivianus was in the eastern empire. I'm not sure which time periods or regions of the empire you're considering.