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Llanidan old church bells.jpg
Llanidan is located in Anglesey
 Llanidan shown within Anglesey
Principal area Anglesey
Ceremonial county Gwynedd
Country Wales
Sovereign state United Kingdom
Police North Wales
Fire North Wales
Ambulance Welsh
EU Parliament Wales
UK Parliament Ynys Môn
Welsh Assembly Ynys Môn
List of places

Coordinates: 53°10′44″N 4°16′23″W / 53.179°N 4.273°W / 53.179; -4.273

Llanidan is a parish in south-west Anglesey, Wales which includes the village of Brynsiencyn. The parish is located along the Menai Strait, approximately 4 miles north-east of Caernarfon (across the strait). The parish church of St Nidans is located near the A4080 highway, a little to the east of Brynsiencyn. The ruins of an earlier parish church survive.


It has been suggested that it was here that the Roman general Suetonius landed in 60 AD, and then again in 78 AD by Agricola, in their efforts to pacify the Ordovices of north-west Wales and Anglesey, at a spot known as Bryn Beddau, ("The Hill of Graves" in Welsh).[1]

In the Middle Ages the parish was part of the commote of Menai, in cantref Rhosyr.

Notable inhabitants[edit]

Amongst the notable people associated with the parish are Henry Rowlands, who was the rector of Llanidan when he published Mona Antiqua Restaurata in 1723, and the industrialist Thomas Williams of Llanidan, who lived in Plas Llanidan.


There is a horse stud: Llanidan Stud, which breeds Welsh ponies of cob type (section C) and Welsh cobs (section D) and is owned by E.W Jones.

Near Brynciensyn is the Anglesea Sea Zoo (Sŵ Mor).


  1. ^ http://www.genuki.org.uk/big/wal/AGY/Llanidan/index.html Genuki transcription from The National Gazetteer of Great Britain and Ireland, 1868.