When a story/game/etc. has a character named Zagreus with the title “Prince of the Underworld”, and Melinoë with the title “Princess of the Underworld”, is this story a derivative of the Hades I & II games? Note that both Zagreus and Melinoë aren’t original creations of these games. They are from mythology & folklore, but they barely appear in ancient documents (Zagreus is basically just a name in ancient myths, and Melinoe only appears in a few Orphic Hymns)
How many places/things are named Pandora, or Hyperion? A lot of names are just commonly used.
When the trailer for a new god game came out, I thought it was sly that they called it something about Albion, which is the setting of the Fable games. The game is being made by the creators of Fable, but they don’t own the Fable IP anymore. (The new Fable game is being made without them.) Turns out Albion is just an old name for England. I had no idea!
Some names are just common.
Another example, Ka is a term known to Stephen King’s Constant Readers (fans) as a force that is something like karma (what it likely comes from), but if you read the Hierarchy books by James Islington, Ka is a villain in the second book. I thought King’s camp (kingdom? heh. I’m so clever) would say something, but it’s probably a common name.
Just depends on where the original author/creator got it from and if they wanna push it.
Also, ask Christopher Paolini, author of Eragon. He lifted a bunch of stuff from other fantasy books. A few readers shook their fists but nothing really happened.