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"LLANFAIR-IS-GAER, (or Bryn Llanfair) a parish in the hundred of Is-Gorfai, county Carnarvon, 2 miles N.E. of Carnarvon, its post town, and 7 from Bangor. It is situated on the shore of the Menai Strait, and includes the township of Brynffynon and port of Dinorwig. The Roman general, Agricola, crossed over to Anglesey at this point. Copper is obtained here, and slate is shipped at the above port. The living is a perpetual curacy in the diocese of Bangor, value £77, in the patronage of the bishop. The church, dedicated to St. Mary, is close to the water's edge. This place takes the suffix to its name-Gaer, signifying a fort or place for defence-from the old Roman camp. The seats are Plas Llanfair, and on the opposite bank, Plas Llanidand, the estate of Lord Boston." [From The National Gazetteer of Great Britain and Ireland (1868) - Transcribed by Colin Hinson ©2003]


1851 Census of Llanfair-is-gaer. A full transcription by Joyce & Douglas Hinde in both "As Enumerated" and "Surname Order" form.


  • St Mary, Llanfair-Is-Gaer, Church in Wales

You can also perform a more selective search for churches in the Llanfair-is-gaer area that are recorded in the GENUKI church database. This will also help identify other churches in nearby townships and/or parishes. You also have the option to see the location of the churches marked on a map.

Church History

Rees, Thomas & John Thomas. Hanes Eglwysi Annibynnol Cymru (History of the Welsh Independent Churches), 4 volumes (published 1871+). Here is the entry from this book for Moriah, Port Dinorwig chapel (in Welsh )  - with translation by Eleri Rowlands (May 2013)

Church and chapel data from The Religious census of 1851 : A Calendar of the returns relating to Wales, Vol 11, North Wales. Ed. by Ieuan Gwynedd Jones, UWP, 1981. The names given towards the end of each entry are those of the informants.

Llanfair-is-Gaer Parish; Statistics; Area 2474 acres; Population 349 males, 338 females, total 687

  • Llanfairisgaer Parish Church              Atendance - afternoon 83          Services in Welsh               Jas. Parry, Asst. Curate
  • Calvinistic Methodist         Erected 1833             Attendance - morning 190 (? incl) 140 scholars, evening 198              Ebenezer Roberts, Deacon, Crug

Description and Travel

You can see pictures of Llanfair-is-gaer which are provided by:



R. D. Evans Papers 1780-1957 - details of extant records on Archives Network Wales
"Robert David Evans lived at Bryn Mair, Tre Gof, Bethel, Llanddeiniolen. He accumulated papers of David Williams (fl. 1885-1893) of Tanrallt, Llanfair-is-gaer, accountant and ship broker; William Williams (fl. 1884-1907) of Greuor Farm, Llanfair-is-gaer, farmer and rate collector; Hugh W. Hughes (fl. 1882-1957), son of William Williams' wife, who also farmed at Greuor; and Robert Ephraim Jones ('Twrog Wyn')."

Historical Geography

You can see the administrative areas in which Llanfair-is-gaer has been placed at times in the past. Select one to see a link to a map of that particular area.


Gwynedd Family History Society  have a diagram of the ecclesiastical parishes of Caernarfonshire (under Parishes)  - with some links to photographs of parish churches

You can see maps centred on OS grid reference SH501659 (Lat/Lon: 53.169036, -4.244006), Llanfair-is-gaer which are provided by:

Military History

List of Llanfair-is-gaer World War I Servicemen  - details of extant records on Archives Network Wales
"Photocopy of list of servicemen from the parish of Llanfair-is-gaer who died in World War I, 1914-1918. Includes details of unit, rank, place, time and circumstances of death"

Public Records

Llanfair-is-gaer Rate Books and other Parish Records 1826-1898  - details of extant records on Archives Network Wales