Meaning A boy's name of Welsh origin, it means "Variant of Dilwyn: Blessed truth Origin of Dillwyn Welsh +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Dillwyn Similar Names Dilwyn Powell Pwyll Abdul Haq Abdul Mubeen Cledwyn Bendigeidfran Gwilym Gerontius Gwylim Year by Year Popularity of Dillwyn