Robert Geraint Gruffydd FLSW FBA (9 June 1928 – 24 March 2015[1]) was a scholar of Welsh language and literature.
In 1999 he succeeded Professor J. E. Caerwyn Williams as Consultant Editor of Geiriadur Prifysgol Cymru, the leading Welsh dictionary.
He wrote books and chapters on a wide range on subjects in all periods of Welsh literature, from his treatment of the earliest Welsh poetry through the work of the medieval poet, Dafydd ap Gwilym, and the Methodist hymn-writer, William Williams Pantycelyn, to 20th-century writers such as Saunders Lewis.
A full bibliography of his publications to 1995 by Huw Walters is included in Beirdd a Thywysogion, ed.
A full bibliography by Huw Walters of his publications from 1996 to 2015 is included in Y Gair a'r Ysbryd: Ysgrifau ar Biwritaniaeth a Methodistiaeth, ed.