I am looking for references to linguistic work on latinization of foreign names by the Romans from the earliest days to the early centuries AD. As this is perhaps quite a wide topic, some field review papers or books would be the best.
To elaborate, well known names, such as Brennus, Viriathus, Ariovistus, Arminius sound quite Latin. What is known about the original sounding of such names, and the transformations that they were subject to when borrowed into the Latin language?