agnomen

noun

ag·​no·​men ag-ˈnō-mən 

plural agnomina ag-ˈnä-mə-nə  or agnomens

: an additional cognomen given to a person by the ancient Romans (as in honor of some achievement)

Word History

Etymology

borrowed from Latin agnōmen, alteration of *adnōmen (by analogy with nōscere "to get to know" : agnōscere "to acknowledge, recognize"), from ad- ad- + nōmen name entry 1 — more at agnize

First Known Use

1654, in the meaning defined above