Cognomina

cog;no;men pronunciation: function: noun inflected form(s): plural cognomens or cog;no;mi;na etymology: latin, irregular from co- + nomen name — more at namedate: 1691 1 : surname; especially : the third of usually three names borne by a male citizen of ancient rome — compare nomen, praenomen2 : name; especially : a distinguishing nickname or epithet— cog;nom;i;nal adjective