Most people who don't write tend to believe that the hardest thing about writing a book is coming up with the story, but that's really not true. I, like most writers, have tons of notes about book plots, stories, or just smidgens of ideas. Actually the hardest part is naming the characters after you come up with them.
In most books, the names are just randomly chosen to reflect average, everyday people. One notable exception to this rule are the Harry Potter books. J.K. Rowling does a masterful job of naming things, places, and people in a way that fits them perfectly.
However, what I wanted to talk about here is the characters in books and where writers get their ideas.
I can't speak for everyone but most of my characters are based on bits and pieces of people I have known throughout my life.
In The Bottle Tree, one of the characters is named Johnny Robinson, which was the name of a black friend of mine from elementary school in Louisiana. The character himself is not a lot like Johnny, but I remember one occasion when we were kids and my great grandmother either hired Johnny's mother to help her pick peas or agreed to let her take a share if she helped pick.
Johnny and I hung out that morning and there was a little awkwardness as we engaged socially, which was rare in Central Louisiana in those days. Some of that awkwardness is shown in the book although the real Johnny was nowhere near as shy as the Johnny from the book.
I took a little different approach with No' Chance. I needed a female character who was likable yet tough, so Jennifer Johnson is an amalgamation of a few different girls/women I've known. Her name was taken from a Robert Earl Keen song, Jennifer Johnson and Me, about a man who finds a strip of those photo booth pictures that you used to be able to take for a quarter. When he finds them in his jacket pocket it immediately brings back memories of one of his loves from his teenage years.
Although I realize that the reference will be lost on many/most people, to me Jennifer's name and character brings back those reasonably carefree days when I was a teenage boy chasing girls, being grown up still a distant prospect.
Writers take characters from people they meet. If you ever have a chance to interact with a writer there's a reasonable chance that one day you or some part of you will make it into a character in a book. Several people I met recently at the Natchitoches NSU Folk Festival are in line to make their appearance once day when the right story presents itself.