middle name vs surname

middle name

noun
  • A name between the first given name and the family name or surname; a second or subsequent given name. 

  • A trait, activity, or action closely associated with or aptly describing a person. 

  • One's mother's maiden name. 

surname

noun
  • 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. 

  • The cognomen of Roman names. 

verb
  • To call by a surname. 

  • To give a surname to. 

How often have the words middle name and surname occurred in a corpus of books? (source: Google Ngram Viewer )