Vetranio in Harpers Dictionary of Classical Antiquities

A Roman who commanded the legions in Illyria and Pannonia in A.D. 350, when Constans was treacherously destroyed, and was proclaimed emperor by his troops; but at the end of ten months resigned in favour of Constantius (Amm. Marcell. xv. 1; xxi. 8).

Read More about Vetranio in Harpers Dictionary of Classical Antiquities