A recent happy find on Amazon for me was a book called "Robert Benchley's Wayward Press," a collection of his press review columns from The New Yorker magazine back in the day. Benchley reviewed the local media (which consisted of 10 daily papers in New York and the radio stations, before tv, cable tv, the internet and what-have-you) for the magazine under the name "Guy Fawkes."
|He also called himself "Guido" Fawkes|
|This just burns a Guy up|
When the word "guy" came to American English, it lost the connection to the oddly-dressed and just came to mean any ...guy...that you might meet.