What is the meaning of Surname?

The 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).

Synonym of epithet, an additional name, particularly those derived from a birthplace, quality, or achievement.

Synonym of nickname, an additional name given to a person, place, or thing, a byname.

The cognomen of Roman names.

(Can we verify this sense?) A clan.

To give a surname to.

To call by a surname.

epithet, nickname

surname, family name

alias, appellation

Source: wiktionary.org