first name vs middle name

first name

noun
  • The first element of a full name in cultures that place the given name first. 

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. 

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