Erwina \e-rwi-na, er-wina\ as a girl's name is of Old English origin, and the meaning of Erwina is "boar friend". Feminine form of Erwin. Erwina has 1 variant form: Irwina. Baby names that sound like Erwina are Erina, Erin, Erinna, Erinn, Erna, Orina, Irina, Erena, Arina and Urina.