Wilbur Whateley was born to a degenerate Dunwich sorcerer's family, his true father being Yog-Sothoth. He grew at an uncanny rate, reaching adult stature within a few years, though his lower body — hidden beneath his clothes — was wholly inhuman.
He visited Miskatonic University seeking a complete Necronomicon for a ritual to open the world to his father, but was mauled to death by a guard dog. The body left behind confirmed he was far less than half-human.