There's an episode where they find a huge underwater pyramid that has ancient Greek writing on it. A character gets possessed and starts speaking Greek. It turns out it's The Temple of Minerva built by Neptune. Now if you had a thing for mythology, like I did, as a kid you probably notice those are the Roman names of the gods. And Minerva is a black woman. This is in the early 90s.
This "replacement rot" has been going on for a long time
It's kind of weird that broadly speaking the Greek gods and figures have more cultural presence than their Roman counterparts (e.g. most people would name "Zeus" before "Jupiter"), except for Hercules, who's the opposite. I wonder why that is.
Vulcan seems to be more popular than Hephaestus, but probably just cause it sounds cooler
Also vulcanized (rubber etc), volcanos, and Star Trek
That is an interesting question. I wonder if an anthropologist would have any thoughts about that?
I'm going to make a wild guess that is because we call the planets using roman names so the association becomes Jupiter:planet Zeus:god but Hercules/Herakles is a person so lacks that confusion.