Siôn ap Hywel
Siôn ap Hywel ap Llywelyn Fychan was a Welsh language poet.
Siôn ap Hywel composed poems on themes of love and religion. He is noted for his elegy on the death of fellow Welsh poet Tudur Aled, in which he mentioned the 'Dull Edern Dafod Aur' in the elegy written by Davod Aur Edeyrn, a dosbarth of the orthography of the Welsh language and of the form of words.