An additional name, particularly those derived from a birthplace, quality, or achievement; an epithet.
An additional name given to a person, place, or thing; a byname or nickname.
The name a person shares with other members of that person's family, distinguished from that person's given name or names; a family name.
(Classical studies) The cognomen of Roman names.
A clan.
To give a surname to.
To call by a surname.