Abstract
This article investigates the origin and history of two names dating from late Antiquity or the migration period. The first is the personal name Tufa, the second is the tribal name Armilausini. The two names can be traced back to a corresponding Germanic loan word in the Latin military language, tufa and armilausia, respectively, both of which are continued in the military language of the Eastern Roman and Byzantine Empire. The names are based on the appellative nouns. Both the appellatives and, even more so, the names turn out to be characteristic products of the multilingual background of the Roman military, as they show several signs of linguistic interference such as lexical reanalysis / folk etymology, morphological remodelling and semantic specialization.