A game about names

OK, this may die a quick and ugly death, but what the hell.

My 12-y-o son was musing today that perhaps Mad Eye Moody had a cousin who was very hoity-toity. His name was Snooty Moody. So I proposed that Mad Eye Moody had an adorable younger sister. Her name was Cutie Moody.

So what are the names of relatives of other literary figures?