guy (n.1) Look up guy at
"small rope, chain, wire," 1620s, nautical; earlier "leader" (mid-14c.), from Old French guie "a guide," also "a crane, derrick," from guier (see guide (v.)); or from a related word in North Sea Germanic.
guy (n.2) Look up guy at
"fellow," 1847, American English; earlier, in British English (1836) "grotesquely or poorly dressed person," originally (1806) "effigy of Guy Fawkes," leader of the Gunpowder Plot to blow up British king and Parliament (Nov. 5, 1605). The effigies were paraded through the streets by children on the anniversary of the conspiracy. The male proper name is from French, related to Italian Guido.