 In the social sciences , the Rhondda has produced Welsh historian John Davies , an important voice on Welsh affairs , who was one of the most recognised faces and voices of 21st century Welsh history , and was also one of the main authors of The Welsh Academy Encyclopaedia of Wales . The Rhondda has also produced J. Gwyn Griffiths , an eminent Egyptologist , who was also a member of the Cadwgan Circle . Griffiths and his wife <unk> Bosse @-@ Griffiths were influential writers and curators in the history of Egyptian lore . 
