'guy' originates from the name 'Guy Fawkes', a historical figure associated with the Gunpowder Plot in England.

'guy' changed from the name 'Guy Fawkes' to a term used for a man or fellow, eventually becoming the modern English word 'guy'.

Initially, it referred to 'a person of grotesque appearance', but over time it evolved into its current meaning of 'man' or 'fellow'.