The name Gwythyr is a Welsh baby name. In Welsh the meaning of the name Gwythyr is: Legendary son of Greidyawl.
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People with this name tend to be passionate, compassionate, intuitive, romantic, and to have magnetic personalities. They are usually humanitarian, broadminded and generous, and tend to follow professions where they can serve humanity. Because they are so affectionate and giving, they may be imposed on. They are romantic and easily fall in love, but may be easily hurt and are sometimes quick-tempered.