Something brought Leopold Stokowski to mind. You seen him if you've ever watched Fansatia.
Anyway, he lived in Hollywood awhile. His son Leo palled around with a grandson of Johannes Brahms. They went to a record store (remember those?). The store had record players to sample the music and they spent way too much time doing that.
The store manager came around to chase them out. He demanded their names so he could call their parents. Leo told them his name was Leopold Stokowski. The manager rolled his eyes and turned to Leo's partner in crime, "And I suppose you are Beethoven?" Leo's pal said, "No, I'm Brahms."
I heard this story in a television interview with Leopold Stowkowski's son.
Of course if he had said Brahms in London he would've been arrested for being drunk and disorderly.