ag·no·men 
(ăg-nōmən)
(ăg-nōmən)n. pl. ag·nom·i·na (-nŏmə-nə)
An additional cognomen given to a Roman citizen, often in honor of military victories.
[Latin : ad-, ad- (influenced by agnōscere, to recognize) + nōmen, name; see n-men- in the Appendix of Indo-European roots.]