Erwinn \e-rwi-nn, er-winn\ as a boy's name is a variant of Irwin (Old English), and the meaning of Erwinn is "boar friend".
The baby name Erwinn sounds like Erwynn, Erwin and Irwinn. Other similar baby names are Elwinn, Erin, Elwin, Arwin, Corwinn, Edwin, Eadwinn, Ermin, Ermino, Erwyn, Ervine, Ervin, Ewin, Kerwinn, Merwinn, Norwinn and Orwin.