agnomen

Sometimes there was also a fourth name, called the agnomen, added from some illustrious action, or remarkable event.

It was this slight connection with ‘the trade’ which gained for Cromwell the agnomen of ‘the brewer.’

To counteract the confusion that would inevitably arise, an agnomen or "tee-name" is usually appended.

I was a little anxious to know whether her ladyship would honour me with an agnomen.

Latin authors to be registered under their nomens, except in those cases where the agnomen has been popularly adopted.

He obtained the Agnomen of Numidicus for his services in the Jugurthine war.

Most Latin authors have three names—the prenomen, which answers to our Christian name; the nomen, or family name; and the agnomen.