family name vs moniker

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. 

moniker

noun
  • A personal name or nickname; an informal label, often drawing attention to a particular attribute. 

  • A person's signature. 

  • An object (structured item of data) used to associate the name of an object with its location. 

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