The Glabriones were the first family to appear in history, and they continued the longest. Members of this family have been identified from the third century BC into the fifth century AD, a span of time that no other Roman family can be proved to have bridged. According to Millar, "he one indubitable case of continuity from the republic to the fourth century is the Acilii Glabriones." They were certainly plebeian, as many of them were tribunes of the plebs. They also had a garden, the , on the Pincian Hill in the 2nd century. A tomb of the Acilii Glabriones was found in Rome in 1888. The surname "Glabrio" is derived from the adjective , "smooth", and probably referred to someone who was bald. Dondin-Payre suggests that, interpreted as "hairless" or "depilated", "Glabrio" had the further connotation of "effeminate".