My Secret Recipe to Name Picking
I’d need to know more about your character’s disposition, when and where the story takes place so it fits the time/era and country/location, etc.
But if I ever have an issue coming up with a name I’d either benchmark or understudy awesome “bad boy” names such as Jax Teller from S.O.A, Riddick, Jesse Pinkman, Walter White, O-Dog, just to name a few of my bad boy fav’s and come up with one similar to my character’s disposition, or I use a name generator online:
http://babynames.net/list/bad-boy-names
http://www.fantasynamegenerators.com/evil_names.php#.Wba2yDYUlkI
https://nameberry.com/list/404/Badass-Baby-Names
If that doesn’t work out, I come up with a word or two of what I want the character to represent and look up the words in a different language and go with what sounds cool, since names can and should have profound meaning…