Meaning Gwenyth means white, pure, and fair. Origin of Gwenyth Welsh +-100%Zoom level changed to 1 Popular Middle Names Grace, Louise, Mae, Rose Pronunciation 🔊 Listen Gwenyth GWEN-ith Similar Names Rhonwen Rhona Glenys Glynnis Guenevere Gwendelyn Gwendolyn Gwenna Glynda Gwendi Year by Year Popularity of Gwenyth