Why Indiana Joan? Jones was a last name. Henry Jones Jr. is the character's full name, with Indiana being a nickname, originally his childhood dog's name that he kept for himself. Despite the idiocy of continuing the story with a female (if you wanted to do that, Steve, then maybe you should have made Indiana and Marion's offspring a daughter instead of a stupid Shia Labeouf), wouldn't it still be Indiana Jones, but with a female first name?