Quintus Pompeius Senecio Sosius Priscus (fl. 2nd century) was a Roman senator who was appointed consul during the reign of Marcus Aurelius.
Sosius Priscus is known for possessing the longest attested name of the ancient Romans. This was due to the practice of polyonymy, where elements of his ancestor's name were incorporated into his own. In full, his name is:
He received a portion of his lengthy name from his father, Quintus Pompeius Sosius Priscus, consul in AD 149, and, although the inscription that recorded his father's full name is damaged, enough of it survives to establish this: