The cywydd ' Y ddyn winfaeth ddynionfawr ' is attributed to him in four manuscripts (Cwrtmawr MSS. 5 (386), 27 (329); N.L.W. MSS. 1246 (42), 5269 (2586), but it is also attributed to Ieuan ap Gronwy (Pen. MS. 99 (57), Mostyn MS. 160 (383)), and Ieuan ab Huw (Jesus College MS. 17 (675), whilst in two manuscripts the name of the author is not given (Mostyn MS. 161 (292), Pen. MS. 66 (42) - 'ai kavodd ai kant'). The earliest copy is that given in Mostyn MS. 161 (c. 1563). ' Er athrod trwm weithred traw ' in Cardiff MS. 12 (295) is also attributed to him.
Published date: 1959
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