Meaning A boy's name of Welsh origin, it means "Legendary son of Beli Origin of Nynnyaw Welsh +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Nynnyaw Similar Names Rhun Casswallawn Caswallon Llevelys Powell Naw Neb Nerth Nerthach Nissyen Year by Year Popularity of Nynnyaw