Wikipedia
Cominia (gens)
The gens Cominia was a plebeian family at ancient Rome, known from the earliest days of the Republic. The first member of the family known to history was Postumus Cominius Auruncus, consul in 501 B.C., and from this it is generally inferred that the gens was originally patrician; but all of the later Cominii known to history were plebeians.