This is a list of Roman nomina. The nomen identified all free Roman citizens as members of individual gentes, originally families sharing a single nomen and claiming descent from a common ancestor. Over centuries, a gens could expand from a single family to a large clan, potentially including hundreds or even thousands of members. Some of these may have been the descendants of freedmen or persons who entered the gens through adoption, while in other cases, different families that had assumed the same nomen in the distant past became confused with one another, and came to be regarded as a single gens.
In the following list, "I" and "J" are treated as separate letters, as are "U" and "V". The letter "K" was rare in Latin, and the few nomina occasionally spelled with this letter were usually spelled with "C". No Roman gentes began with "X", and the letters "Y" and "Z" occurred only in names borrowed from Greek. The letter "W" did not exist in Classical Latin. Nomina are given in the masculine form—the form borne by all male members of a gens. The gentes themselves were grammatically feminine. Those nomina representing gentes for which separate articles exist are linked to those articles; those belonging to only one or two individuals, or known from only a few inscriptions, are not usually linked, but may be cited to the inscriptions in which they are attested.