The Llys remained the symbolic throne of the Kings of Gwynedd from the 9th century to the 13th century, though Garth Celyn, Aber Garth Celyn, now known as Aber or Abergwyngregyn on the mainland opposite the port of Llanfaes, became the royal home and headquarters, and centre of resistance, from the 12th century until Tywysog Llywelyn ap Gruffudd was lured into a trap and put to death on 11 December 1282. The Royal Annals of Edward I of England show the Llys was dismantled in 1315 to provide building materials for nearby Beaumaris Castle
...appeared to demonstrate the presence of a two-phase, round-angled, rectangular enclosure, at least 70m NNE-SSW, thought to represent a Roman military work, refurnished in the early medieval period as a llys (Princely court) enclosure; although a radio-carbon date centring on the period 27-387AD, appears to support this thesis, the identification of a Roman work is currently out of favour: the site of the llys, whose (partial?) dismantling is recorded in 1317, is regarded as uncertain: two sculptured heads, of apparent C13 style, are known from the village (White 1978): the putative curving angle of the enclosure has been suggested to hint at the former presence of a motte: excavations at the traditional site of the llys, about 650m to the WSW, recorded only C18 remains. Excavation, 1973-4 (White 1979)[1].
Aberffraw has a population of 599 of which 79.8% are able to speak welsh (2001 Census). Attractions near Aberffraw village include Llyn Coron (a lake), Barclodiad y Gawres, a Neolithic burial chamber and the island of Cribinau with the 7th century church of Saint Cwyfan perched on top. The church still holds services in the summer and is sometimes used for weddings with access by boat. The village has an excellent sandy beach which was awarded the Blue flag rural beach award in 2005, and is on the Anglesey Coastal Path.
The Wynn Baronets of Gwydir were created in the Baronetage of England in 1611—one of the initial creations—for John Wynn, of Gwydir. The members of this line were heirs to the Aberffraw claim to the Principality of Gwynedd and Wales as direct descendents of Owain Gwynedd. The family continued to be prominent in politics, all the baronets save Owen sat as members of parliament, often for Carnarvon or Carnarvonshire. This creation became extinct in 1719, on the death of the fifth baronet. Wynnstay, near Ruabon, passed to Sir Watkin Williams, who took the name of Williams-Wynn.