They were probably descended from the Hermunduri, a Suevic people referred to by Tacitus as living in this region during the 1st century.
There can be little doubt, however, that the ancient Hermunduri formed the preponderating element in the nation.
The Hermunduri had apparently belonged to the Suebi, but it is likely enough that reinforcements from new Suebic tribes had now moved westward.
The Hermunduri in the basin of the Saale were in alliance with the Romans and occupied northern Bavaria with their consent.
His supremacy extended over all the Siiebic tribes (except Domestic perhaps the Hermunduri), and most of the peoples wars of eastern Germany, including apparently the Lugii of the and Goths.
The latter, however, was soon expelled by Vibilius,king of the Hermunduri,and his power was transferred to Vannius, who belonged to the Quadi.
In the year 50 Vannius, king of the Suebi, was driven from the throne by Vibilius, king of the Hermunduri, and his nephews Vangio and Sido obtained his kingdom.
SUEBI, or SuEVI, a collective term applied to a number of peoples in central Germany, the chief of whom appear to have been the Marcomanni, Quadi, Hermunduri, Semnones and Langobardi.
The former home of the Marcomanni was occupied by the Hermunduri a few years before the Christian era.
The Alamanni (q.v.) seem to have been, in part at least, the descendants of the ancient Hermunduri, but it is likely that they had been joined by one or more other Suebic peoples, from the Danubian region, or more probably from the middle Elbe, the land of the ancient Semnones.