Llanfair-is-gaer was an
ecclesiastical parish
A parish is a territorial entity in many Christianity, Christian denominations, constituting a division within a diocese. A parish is under the pastoral care and clerical jurisdiction of a priest#Christianity, priest, often termed a parish priest ...
in Caernarfon, Gwynedd: the parish church was St Mary's.
Geograph
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References
Hamlets in Wales
Populated places in Gwynedd
{{Gwynedd-geo-stub