It's funny how these things layer up. The obvious starting point is older literature—Shelley's 'Frankenstein' obviously, but also earlier Gothic stuff where characters are literally raising the dead. That Victorian-era dread gives you names like Mortimer, Silas, Alistair. But then the gaming scene took over in the 80s and 90s, so you get these badass, single-word titles like Kel'Thuzad from Warcraft or Xykon from Order of the Stick—way more bombastic. I think modern web serials have added another flavor, pulling from less obvious mythologies. A necromancer in 'A Practical Guide to Evil' might get a name that's almost bureaucratic, which is its own kind of creepy.
Honestly, the most interesting ones to me lately are the ones that sound almost gentle. Names like Lichyard or Boneweaver. They're not trying to be scary; they're describing a function, which somehow makes the character more unsettling. You get the sense they see their craft as a trade, not just evil for evil's sake. It's a subtle shift from the older influences, but it really changes how you view the archetype.