When Paul was a kid in grammar school, his father made him shave his hair really short. It also didn't help that this was at the time when long hair (a la The Beatles) was considered the pinacle of coolness among kids and teens. Everyone at school called him "Bonehead" and eventually the name stuck.

Bonehead is the founding member of Oasis. He's the one that brought Paul McGuigan, Tony McCarroll and some singer (whom they soon fired) together in a band called "The Rain". He may have written one or two songs of his own, but at that time they mostly played covers of previoulsy written songs. Once Liam Gallagher joined the band, he started writing songs with him. Later, Noel joined the band and took over all of the song writing chores.

After recording the 4th Oasis album Bonehead decided to quit the band to dedicate to other things in his life.