SIÔN PHYLIP ( 1543? – 1620 ), lived in the farmhouse of Mochres , a few miles from Harlech . His family was descended from an ancestor named Palgus , who left as sole heir a daughter Catherine , who m. Ieuan le Colier ; from this union, seven generations later, came the poet Siôn Phylip . (See Lewys Dwnn , Heraldic Visitation of Wales ). Before graduating at Caerwys Siôn was a pupil of Wiliam Llŷn (q.v.) . He wrote a grammar of Welsh metrics ( Pen. MS. 89 and Mostyn MS. 144 ) and was in his turn the poetic teacher of his brother Rhisiart , and probably also of his sons, Gruffydd and Phylip Siôn . Siôn Phylip wrote nearly 200 cywyddau and awdlau and numerous englynion .
Siôn Phylip wrote a paraphrase of the first psalm. The religious and didactic group contains some interesting poems. One of them, Cywydd y ffenics , appears very often in the manuscripts. Perhaps the most interesting of the miscellaneous poems are the cywyddau ymryson — poems written in bardic controversies, with his own brother, Rhisiart Phylip , for precedence at Nannau — with his uncle, Siôn Dafydd Siencyn , with Edmund Prys , with Thomas Prys of Plas Iolyn , and, most interesting of all, with Siôn Tudur of S. Asaph . Siôn Phylip was also associated with three other ymrysonau , viz., the two which Edmund Prys had with Wiliam Cynwal and Huw Machno respectively, and the one between Griffith Hafren , Rhisiart Phylip , and Ieuan Tew . Siôn Phylip wrote also a very large number of englynion .
He wrote nothing at all in the freer metre of the carol which was to become more fashionable in the 17th cent. in the hands of William Phylip , Gruffydd Phylip , and others.
The bard met his death by drowning at Pwllheli , 13 Feb. 1620 , when crossing to Mochres on the way back from a bardic tour of Anglesey and Caernarvonshire . He left a widow and six children. His death was mourned by Edmund Prys , Richard Cynwal , Ieuan Llwyd , Gruffydd Hafren , Rowland Fychan , and by his own son, Gruffydd Phylip . He was buried close by his home in the parish church of Llandanwg . His grave(Table style) can be seen at the front of the church.