In the original radio series, the name was Paul Neil Milne Johnstone… who was an actual schoolfriend, or at least was at school with, Douglas Adams. He didn't appreciate being name-checked in the Hitchhikers Guide to the Galaxy so it had to be changed. I believe that if you closely watch the fake video graphics in the BBC TV series, you can see some of Adams' best efforts to remember Johnstons actual "poetry" on screen.
