Hah it was more that Howl/aka Howell was an eternally broke phd student back in Wales and his family thought he was a loser.
The film is not much like the book outside of the basic details, but no-one really cared because it was a good film, and the author and Miyazaki were friends. The author, Diana Wynne Jones is not really famous, but very well respected, and a lot of her books hold up for adults to read too. I edited a whole collection of essays about her a while back, and got invited to her funeral, which was nice.