It created the shires of Flint, Caernarfon, Anglesey, Merioneth, Cardigan and Carmarthen – and established a system of government that lasted until Henry VIII’s Act of Union in 1536.
Creodd y Statud siroedd Fflint, Caernarfon, Ynys Môn, Meirionnydd, Aberteifi a Chaerfyrddin - a sefydlodd system lywodraethu a barhaodd tan Ddeddf Uno Harri VIII yn 1536.