Vandals

Germanic and Proto-Slavic tribes of Central Europe around 3rd century BC.
Migrations of the Vandals from Scandinavia through Dacia, Gaul, Iberia, and into North Africa. Grey: Roman Empire.
Till Goths, and Vandals, a rude Northern race, / Did all the matchless Monuments deface

Robin Hemley wrote a short story, "The Liberation of Rome", in which a professor of ancient history (mainly Roman) is confronted by a student claiming to be an ethnic Vandal.