= last name of roman origins
( vs. cyrillic &/or slavic )
The cognomen (//, Latin: [koːŋˈnoːmen];
Latin plural cōgnōmina; con- "together with" and (g)nōmen "name") refers to the third name of a citizen of ancient Rome, under Roman naming conventions.
The cognomen started as a nickname, but lost that purpose when it became hereditary.
Hereditary cognomina were used to augment the second name (the family name, or clan name) in order to identify a particular branch within a family or family within a clan.
Outside of this particular use of the word, the term has taken on a variety of other meanings in the contemporary era.