What name do you think is nice for a book character?

He has black hair, green eyes and is slightly taller than average.

He's quite reserved by nature, yet curious and assertive. He's very articulate and sometimes sharp-tongued, but he's kind, polite, and gentle to people who interest and fascinate him.

Thanks for your answers! If you can think of any more unusual and aesthetic names starting with J, feel free to suggest them to me 🙂

LG