Definitions
1.NounThe portion of a person's name that is generally hereditary or treated as an indicator of a person's family, which may be shared with other members of the family, or otherwise derived from their names in some fashion; distinguished from that person's given name(s)."James is my first name, and Smith is my surname."
2.NounSynonym of epithet, an additional name, particularly those derived from a birthplace, quality, or achievement.
3.NounSynonym of nickname, an additional name given to a person, place, or thing, a byname.
4.NounThe cognomen of Roman names.
5.VerbTo give a surname to.
6.VerbTo call by a surname.