(ˈnəʊmɛn) n, plnomina (ˈnɒmɪnə) (Historical Terms) an ancient Roman's second name, designating the person's gens or clan. See also agnomen, cognomen, praenomen[Latin: a name]
no•men
(ˈnoʊ mɛn)
n., pl. nom•i•na (ˈnɒm ə nə, ˈnoʊ mə-) (in ancient Rome) the second name of a citizen, indicating the person's gens, as “Gaius Julius Caesar.” [1885–90; < Latin nōmen name]