GWYNDY, or GWYN-DY (GWIN-DY), a chapelry, in the parish of LLANDRYGARN, hundred of LLYVON, county of ANGLESEY, NORTH WALES, 12 miles (E. by 8.) from Bangor. The population is included in the return for the parish. It formerly formed a part of the parish of Holyhead, and is considered to be situated half-way between that port and Menai bridge, though somewhat nearer the former. There is a post-office attached to the inn, which is the principal house in the place.