Meaning Of Welsh origin meaning 'gentle'. Origin of Gareth Welsh +-100%Zoom level changed to 1 Popular Middle Names Abdiel, Abner, Adrian, Jaiden, Locke, Moises, Thomas, William Pronunciation 🔊 Listen Gareth GAR-eth Similar Names Aneirin Garreth Powell Geraint Gwilym Gerontius Gwylim Bryn Emrys Gwallter Year by Year Popularity of Gareth