descendant vs lastborn

descendant

adj
  • Descending from a biological ancestor. 

  • Proceeding from a figurative ancestor or source. 

  • Descending; going down 

noun
  • A language that is descended from another. 

  • A word or form in one language that is descended from a counterpart in an ancestor language. 

  • A later evolutionary type. 

  • One of the progeny of a specified person, at any distance of time or through any number of generations. 

  • A thing that derives directly from a given precursor or source. 

lastborn

adj
  • Born last in a family; youngest in a the family. 

  • Younger than anyone else in a group. 

noun
  • The youngest child of a family. 

  • The youngest member of any company or organization. 

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