cognomen [kɒg'nəʊmen]

以下由轻松背单词网站提供

n.姓；绰号

a familiar name for a person (often a shortened version of a person's given name);

Rufus is an unusual cognomen. 鲁弗斯不是一个平常的姓。
Red got his cognomen for his red hair. “红毛”的绰号源于他的红头发。