Lucas continued: “Indiana was the prototype for the Wookie – for Chewbacca [from Star Wars].
“He was this big huge [Alaskan] Malamute. He would sit next to me in the car. A giant bear of a dog.
“And so I named the character after my dog! And ultimately put that in the movie.”
As Lucas noted, in the final moments of his third film with Spielberg, The Last Crusade, the origins of Indiana’s name were revealed by Harrison Ford himself.