Someone brought up Twilight names? Okay, I went down this rabbit hole years ago and the main thing is that Meyer took a 'names have power' approach, pulling from history and mythology but with a very specific, sometimes symbolic twist. Carlisle, for instance, is an old English surname that Meyer said she chose for its aristocratic and gentle sound, which fits his healer persona. She's mentioned liking the 'car' sound in names for the Cullens. Edward is straightforward—classic, timeless, royal even, which mirrors his old-world demeanor. But the real fun is in the Volturi.
Aro, Caius, and Marcus are all names of Roman emperors or historical figures. Aro might be derived from the Latin 'aurum' for gold, tying to his power or his covetous nature. Caius is an old Roman praenomen, and Marcus as well, giving them that ancient, bureaucratic feel. It’s not just random; it’s a deliberate choice to ground these ancient, power-playing vampires in a sense of real, faded empire. Then you have the non-Cullens like Jasper, which is a gemstone, hinting at his 'psychic shield' being hard and multifaceted. Rosalie is just a beautiful, floral name that contrasts with her bitter backstory—a deliberate irony.
I think people overlook the human names, too. Like Bella Swan—'Bella' for beautiful, 'Swan' for the ugly duckling transformation she undergoes. It’s all very on-the-nose when you look at it, but it works for the saga's fairy-tale logic. The origins aren't deeply obscure; they’re a blend of clear symbolism, historical borrowing for gravitas, and just what sounded right to Meyer in building her specific atmospheric blend of romance and Gothic menace. She wasn’t creating wholly new vampire lore names so much as curating existing ones for very specific emotional and thematic resonance.