How on earth to more people know some Garfield character or a bloody muppet 3x better than Cobblepot? One of the most iconic villains ever. I am happy that I didn't know those two. Ashamed that I could get Olaf but forget the Shakespeare ones though, I blame my younger sister.
I only got it because it allowed his surname as an answer, had no idea his first name was Oswald. Anyway The Penguin is far more obscure than Sesame Street.
I was assuming that Ozy-whatsit was some new superhero until I googled it. Embarrassed to learn it was from a Shelley sonnet. Missed that one somehow in lit class.
A quick check on wikipedia, it actually says Anubis is the god of the dead. Anubis: God of funerals, death, the dead and the afterlife. Osiris: God of the afterlife, death, life, and resurrection. After further research a more accurate wording of the question would be "Egyptian god of the underworld". Most sites I've looked at list Osiris more as ruler/god of the underworld than god of the dead.
Odysseus and Ozymandias were real people. Of course, the Odyssey didn't happen, and the Odysseus presented in that tale is a fictionalised version of the real king, but with Ozymandias there is no excuse. Ozymandias is another name for Rameses II. The Shelley poem doesn't fictionalise anything about him.
I'm going to say that the events described in the story didn't actually happen, especially because the traveler described in the poem presumably would have had to have been able to read hieroglyphics or some other ancient script to actually read the text quoted in the poem.