I would be willing to bet that none of the high-school students whom I teach have ever hear of Fu Manchu, Tarzan, Charlie Chaplin, Zorro, Laurel & Hardy, Buck Rogers, or Popeye.
Most of the characters from the 1930s would be unknown to them, too.
They wouldn't know The Shadow, The Three Stooges, *spoon* Tracy, John Wayne, Doc Savage, The Lone Ranger, Flash Gordon, Li'l Abner, The Phantom, Bob Hope, or Ellery Queen.
The only reason they would know the name Joe Louis is that our local Detroit Redwings played in Joe Louis Arena until a few years ago.
A while back when I asked around, none of them had ever heard of Bugs Bunny, but I'm guessing that a few of them would know the Warner Bros. characters now because of the recent Space Jam movie.