Irwyn \i-rw-yn\ as a boy's name is a variant of Irwin (Old English), and the meaning of Irwyn is "boar friend".
The baby name Irwyn sounds like Arwyn and Erwyn. Other similar baby names are Irvyn, Berwyn, Bryn, Carwyn, Corwyn, Crayn, Darwyn, Derwyn, Durwyn, Irvin, Erwynn, Frayn, Garwyn, Irven, Irwinn, Iwan, Kerwyn, Merwyn, Norwyn and Orwynn.