Welsh manifestation of the Gaulish horse goddess Epona and the Irish goddess Macha. She is best known from the Mabinogion, in which she makes her appearance on a pale, mysterious steed and meets King Pwyll, whom she marries. Unjustly accused of killing her infant son, she was forced to carry people on her back like a horse until she was vindicated by her son's return.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on Rhiannon, visit Britannica.com.

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