When it comes to the good guys, I have no problem finding a name…but for my antagonist? Ha! Not so much. I’m looking for names with a Celtic/Welsh/Native American sound to them, and mean things like “murder”, “killer”, “brute”, “taco hater”, and so on. I want the names to be unique and unusual, so they stand out. So no [name_m]Lucifer[/name_m], Death, Moriarty, Hitler, Taco Hater, etc. 
Any help is much appreciated!
(For those wondering, I write mostly fantasy.)
[name_m]Devlin[/name_m], [name_m]Killian[/name_m], [name_m]Ungus[/name_m], [name_m]Ulrich[/name_m]…also anything that sounds strong and/or pretentious can work on a villain.
Off the top of my head…
[name_m]Mordecai[/name_m]
[name_u]Lex[/name_u]
[name_m]Draco[/name_m]
[name_m]Bates[/name_m]
[name_m]Spike[/name_m]
[name_m]Thorn[/name_m]
[name_m]Vlad[/name_m]
[name_m]Damien[/name_m]
[name_m]Keller[/name_m]
[name_m]Ryker[/name_m]
[name_m]Axel[/name_m]
[name_m]Benji[/name_m]
[name_u]Zephyr[/name_u]
Mohan
[name_m]Icarus[/name_m]
[name_m]Ignatius[/name_m]
[name_m]Ulysses[/name_m]-“wrathful”
Umbriel-“one in shadow”
[name_u]Douglas[/name_u]-“black water”
For high fantasy:
Vlorë
Erebus
Escion
Other:
[name_m]Conan[/name_m]
[name_m]Ryker[/name_m]
Sitar
[name_m]Maverick[/name_m]
[name_m]Aleric[/name_m]