There is also a fragmentary manuscript known as Peniarth 6 which includes a little of Rhiannon's story.Both these manuscripts are now held at NLW (the National Library of Wales.Another later copy is in Llyfr Coch (The Red Book of Hergest), a manuscript now held at Jesus College, Oxford.
Rhiannon's original story is mainly in the First Branch of the Mabinogi, with more in the Third Branch.
She is a strong minded Otherworld woman, who chooses Pwyll, prince of Dyfed (west Wales), as her consort, in preference to another man to whom she has already been betrothed.
Rhiannon is highly intelligent, politically strategic, and famed for her wealth and generosity.
Rhiannon is a major and classic figure in the earliest prose literature and mythology of Britain, the Mabinogi.
This is a set of tales classified as Celtic or British mythology, Welsh literature, Welsh mythology. 1100 in mediaeval Wales from earlier oral traditions.
It is culturally prominent in literary, mythological or Welsh circles today, known worldwide in English translations.
The Mabinogi is made up of Four Branches, or nodes.
It is published on its own but also forms part of a larger collection known as the Mabinogion.
The Mabinogion is a name based on an old mediaeval scribal error in the original manuscripts.