So, I make a lot of rough draft concepts for champions. And I must say, naming is a lot harder to do than it looks. How does someone consistently create names that fit a personality well?
I look forward to any advice [slayer-pantheon-thumbs]
Lots and lots of iteration + google image search (with filters disabled) + regional sensitivity checks.
Have you tried reading dev diaries to see how other designers came to arrive at the names they make?
Find a name that fits well, For example, If you have a badass viking warrior, you could name them in english then translate it... Like 'Badass" translates to 'Tuffing' in Scandinavian, and, between you and me, that fits a Viking pretty well...
most champions are a pun on their base theme. 
for example.
I guess a decent maount of good names can e achieved with sound-a-like of real names or things connected to the champion (like Echo and Ekko).
I've done a few champion concepts, and the best thing that works for me is to use a combination of naming tactics.
First I'll decide what just sounds right. Rolls off the tongue and pops in your head.
Then I take to translators. Translating adjectives to various languages helps to find something more unique. If you can't find fun adjectives, I find Thesaurus.com to be incredibly useful.
Then I start reworking the name. Mashing translated names, adjusting spelling and pronunciation, swapping letters. Even randomly translating the Frankenstein name to see how it works.
In the end you get names like Atillok, which roughly means darkness slayer. It's badass, but has an air of mystical origins to it.
