I really love astronomy, so most of my protagonists have names inspired by stars! 
My first protagonist is Alioth, named after the star in the Ursa Major constellation. He’s the classic golden-haired hero—noble, radiant, and a little emotionally constipated. 
The second one is literally named Star. Yeah. I wasn’t even subtle with that one
She’s kind of the mirror to Alioth: where he’s all optimistic and chosen-one-y, she’s like “why is the universe my problem??”
Then we have Siegfried, based on the legendary German dragon-slayer. In my story, he’s a gentle knight who would rather protect his friends than fight—but he can throw hands when needed.
Friedrich was named after a famous German poet and novelist (shoutout to Novalis), but I turned him into the chaotic funny guy who somehow always ends up in danger on purpose.
And Klara… her name comes from Clara Zetkin, a badass German activist. she’s an advocate for women’s rights and equality in the late 1900s. I reimagined her as the smart one in the party who probably has a hundred conspiracy boards in her room and gives the group all the Big Brain energy.