The gens Foslia, later Folia, was a patrician family at ancient Rome. The first of the gens to appear in history was Marcus Foslius Flaccinator, consular tribune in 433 BC.[1]
The only praenomina known to have been used by the Foslii are Marcus and Gaius.[1]
The only family name of the Foslia gens appearing in history was Flaccinator. This family was extinct at an early date.[1]