I got a question about Grandpa Simpson: In one episode, he mentions he was in a fanclub of a cowboy character as kid, and he pulls out his membership card, with his name being "Little Grandpa Simpson" on it.
I heard it was like that because some of the show creators who worked on that episode didn't know or care that he did have a proper first name. At the time, I kinda took it as a joke like how the all the Berenstein Bears are all named for their family relation titles, but if true, it makes me :shrug:.