Meaning A boy's name of Welsh origin, it means "Legendary son of Greidyawl Origin of Gwythyr Welsh +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Gwythyr Similar Names Powell Gilvaethwy Gleis Goreu Gruddyeu Gwalhaved Gwallawg Gwevyl Gwyddawg Gwyngad Year by Year Popularity of Gwythyr