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Welsh: Tri theyrn taleithiog Ynys Prydain or Tri thywysog taleithiog. Myv. Arch....
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Welsh: Tri theyrn taleithiog Ynys Prydain or Tri thywysog taleithiog. Myv. Arch., Gee's ed., p. 405, No. 43. Cited by Wikipedia: Anarawd ap Rhodri Accessed 2/15/2019 jhd