Original: Guy Fawkes (April 13, 1570 – January 31, 1606), also known as Guido Fawkes, the name he adopted while fighting for the Spanish in the Low Countries,  belonged to a group of Roman Catholic restorationists from England who planned the Gunpowder Plot of 1605.
Simplified: Guy Fawkes (13 April 1570 – 31 January 1606) sometimes known as Guido Fawkes, was a member of a group of Roman Catholic revolutionaries from England who planned to carry out the Gunpowder Plot.