British Kings and Queens @ p. 127
The cited information was published by 1998, Barnes and Nobles (Ref: p. 127) The author/originator was Mike Ashley.
References (4)
Parent Source:
British Kings and Queens
Individual:
King Rhys ap Arthfael of Gwent
Individual:
King Arthfael ap Rhys of Glywysing
Individual:
King Rhys ap Ithel of Glywysing