When you're totally on your own – like Coraline is – you need to have a super strong sense of self to get you through things. In Coraline, our heroine doesn't have friends or family to rely on, so she learns this lesson pretty quickly. She doesn't need other people to know her in order to know herself: even if everyone forgets her name, it doesn't mean she isn't Coraline. And of course, other people's identities become an issue for Coraline, too. Who is the other mother? What is the other mother's identity in relation to Coraline's real mother's identity? And the three ghost children? Can they have identities if they don't even have names? Coraline is struggling with all of these questions, all the while trying to save the day. Impressive.
Mr. Bobo's identity becomes more clear the moment Coraline learns his name.
It doesn't matter what other people think of Coraline: identity comes from the inside.