surname vs. forename

surname

noun

  1. Also called last name. the name that a person has in common with other family members, as distinguished from a first name or given name; family name.

  2. a name added to a person's name, as one indicating a circumstance of birth or some characteristic or achievement; epithet.

verb (used with object)

surnamed, surnaming 

  1. to give a surname to; call by a surname.

forename

noun

  1. a name that precedes the family name or surname; first name.