D defs.my
Entry 2 senses Webster, 1913

Agnomen

/(ăg*nō"mĕn)/ · Ag·no·men · IPA
01 n. An additional or fourth name given by the Romans, on account of some remarkable exploit or event; as, Publius Caius Scipio Africanus.
  1. 1.
    An additional or fourth name given by the Romans, on account of some remarkable exploit or event; as, Publius Caius Scipio Africanus.
  2. 2.
    An additional name, or an epithet appended to a name; as, Aristides the Just.