The Priscus Attalus reference article from the English Wikipedia on 24-Apr-2004
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Priscus Attalus

Priscus Attalus had been important senator in Rome (serving as Urban Prefect in 409) and had the exceptional honor of being twice proclaimed emperor by the Visigoths, in an effort to impose their terms on the ineffectual Emperor Honorius, in Ravenna: he held the title of emperor in Rome, during 409, and later in Bordeaux in 414. His two reigns had lasted only some months; the first one ended when Alaric believed it was hampering his negotiations with Honorius, and the second came to an end after he was abandoned by the Visigoths and eventually captured by Honorius' men. Attalus was obliged to participate in the triumph Honorius celebrated in the streets of Rome in 416, before finishing his days exiled in the Lipari Islands.