agname vs family name

agname

noun
  • An appellation over and above the given name and surname. 

family name

noun
  • A given name common in a family, or already borne by someone in the family (in the context of naming someone in the family after that family member). 

  • A surname. 

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