Rennia gens
The gens Rennia, occasionally written Renia, was an obscure plebeian family at ancient Rome. No members of this gens obtained any of the higher offices of the Roman state, but the family is known from inscriptions, and coins issued by a certain Gaius Renius, depicting the head of Roma on the obverse, and on the reverse Juno Caprotina in a chariot pulled by two goats. Origin. The appearance of Juno Caprotina suggests that the Rennii may have originated at Lanuvium, where Juno was particularly revered. The etymology of the nomen "Rennius" is uncertain; Chase suggests a possible connection  with the Latin "renes", kidneys. Praenomina. Like other families known chiefly from imperial times, the Rennii seem to have confined themselves to the most common praenomina, and particularly "Lucius", "Gaius", and "Marcus". The only other names found among the Rennii are "Publius", "Quintus", and "Decimus", of which only the last was relatively uncommon. Branches and cognomina. The Rennii do not appear to have been divided into distinct families, and all of their surnames appear to have been personal cognomina, many of them probably having been the original names of freedmen of the gens. Of those that were more typical of  Roman surnames, "Aestivus" refers to the summer, and was probably given to someone born during that season. "Candidus" means gleaming white, and could refer to one's hair or clothing. "Crispinus", a diminutive of "Crispus", referred to someone with curly hair. "Faustus", fortunate, and "Proculus" were old praenomina, which came to be used as surnames in the later Republic and imperial times. "Felix", happy, and "Firmus", strong, "Hilarus", cheerful, "Rufus", red, and "Venustus", charming or handsome, were all common names; "Laetus", glad, and "Orientis", eastern, were more distinctive. A number of other surnames borne by both the men and women  of the Rennii were also old praenomina, or similar individualizing cognomina, including "Maxima", eldest, "Prima", first, "Secundus", second, and "Tertius", third.