Foryd Bay, there is a small linear settlement of rectangular buildings, but no others are known from North Wales. The western and southern parts of the settlement were fairly regular with one building in each plot. The northern and eastern parts were less regular and more difficult to interpret. Two hundred and seven pottery shards were found on the surface of the field to the south of Tai Cochion. These dated from c. 100 to c. 300, including a high proportion of high-status 2nd century material. In the burned level of one building, many shattered Lezoux colour-coated beakers may be the stock of a shop. Several coins were found, the latest was of Constantius II (337-347). Geophysical survey at the western end of the site shows a large prehistoric defended settlement. The settlement is sub-circular with dimensions of 130m x 100m and is defended by a double bank and ditches. A series of circular anomalies in the interior could indicate several phases of round houses. The probable course of the Roman road runs immediately to the south of the defensive ditches and the entrance appears to open onto the road. The Romans probably improved a pre-existing Iron Age trackway and may have abandoned the Iron Age settlement. Middle Ages In the Middle Ages, the parish was part of the commote of Menai, in cantref Rhosyr. Governance A Llanidan electoral ward existed, which also included the community of Llanddaniel Fab to the north. The population of the ward at the 2011 census was 1,851. Since the 2013 county elections Llanidan has been part of a new ward, Bro Rhosyr, which includes three neighbouring communities and elects two county councillors. Notable people Amongst the notable people associated with the parish are: Rowland Ap Meredydd (ca.1529 – ca.1600), of Bodowyr in Llanidan, a politician. Owen Holland (MP) (died 1601), of Plas Berw, Llanidan, a Welsh politician. Henry Rowlands (1655–1723), the rector of Llanidan when he published Mona Antiqua Restaurata in 1723 Thomas Williams of Llanidan (1737–1802) Member of Parliament and industrialist, lived in Plas Llanidan Carwyn Williams (born 1965) an ex-professional surfer from the Mumbles, lived here for a period of time. Amenities There is a horse stud: Llanidan Stud, which breeds Welsh ponies of cob type (section C) and Welsh cobs (section D). Near Brynsiencyn is the Anglesey Sea Zoo. Llanidan Hall Llanidan Hall is a Grade II* listed building and its