Headscratchers / Mona Lisa Smile

• At the wedding, Bill calls Katherine's attention to "Mr. and Mrs. Gordon Jones, the actual historical family" who inspired the phrase "keeping up with the Joneses". In real life, that saying is based on an early 20th century comic strip, not a real family. What Bill does isn't quite Hollywood History, but it must qualify as some trope or other. Does anyone know which?
  • I suppose you could call it Artistic License – History.
  • It’s a joke about the fact that their name is Jones and they’re very influential.
  • It's possible that the writers intended this as Genius Bonus Foreshadowing that Bill is a consummate liar, especially when he's trying to impress someone.