Hywel ap Rhys was a 9th-century king of part or all of Glywysing (ruled c. 840–886) in southern Wales.
His sons Arthfael and Owain were probably responsible for the reünification of the realm of Morgannwg. A third son may have fallen assisting Rhodri the Great resist a Mercian invasion of Anglesey around 843.
- ^ Charles-Edwards, T. Wales and the Britons, 350–1064, p. 495. Oxford Univ. Press, 2012. Accessed 20 Feb 2013.
- ^ Archæologia Cambrensis, Vol. X, 3rd Series. "Chronicle of the Princes", p. 13. J. Russell Smith (London), 1864.
- ^ Davies, Wendy. The Llandaff Charters, p.124. University of Wales Press, 1979.
- ^ Ibid.