I just noticed, the vampire is to the folklore monster as the crab is to the crustacean and the weasel to the carnivorous mammal.
The Slavic word for werewolf means a vampire in many if not most modern languages (and was borrowed into Romanian in that sense). The Latin word for screech-owl, later (probably a euphemism) witch, is a vampire in Romanian. The ghoul first appears in Babylonian folklore as a psychopomp and plague demon; now it eats corpses (corpses, blood: not a sharp distinction) and is often just an undead human, not a jinni. And a lot of modern Japanese fiction, like Kimetsu no Yaiba and Owari no Seraph, now portrays oni as former humans that prey on their own kind, often with the same treatment and character beats as found in modern vampire fiction.
Of course, oddly, the wendigo, which like the upir and the revenant was always a predatory ghost, is now increasingly portrayed as some kind of malevolent fairy. So the process (“vampirization”?) does work in reverse too.
