Why is the 'mor' in 'Voldemort' so evil-sounding? - The Week
Geege Schuman stashed this in Writing
Sherlock Holmes's mortal nemesis was Professor Moriarty.
Harry Potter's nemesis was Voldemort.
Doctor Who had a nemesis named Morbius. So did Spider-Man. Morbius was also the name of the antagonist in The Forbidden Planet.
Frodo Baggins went through the mines of Moria to get to Mordor, where he met Sauron, who, as great a villain as he was, started out as the lieutenant of Morgoth, the original and darkest villain in the world of Tolkien's Middle Earth.
H.G. Wells sent his time traveller into the future to encounter a cave-dwelling evil race called the Morlocks. He also created an evil genius called Dr. Moreau.
King Arthur was betrayed by Mordred.
The really scuzzy city in Terry Pratchett's Discworld series is Morpork.
So what's the deal with "mor"? Is there something to the syllable that suits it for melancholy, darkness, and villainy?
Good observation! I think it's meant to invoke death-related English words derived from borrowing Latin mors/morte, e.g., mortal. Spanish muerte (death) is derived directly from Latin mors.
That borrowing from Latin I think explains why the word shows up in so many evil names.
Cool, I never realized this till just now. Thank you Lucas and Geege!