Allt Cefn-y-gefail (Topographic feature).
Grid Reference: SN 78687 37555. Parish: Llanfair-ar-y-bryn, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Blaen-y-gefail (Unclassified).
Grid Reference: SN 89351 42285. Parish: Penbuallt, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bod-gefail (Unclassified).
Grid Reference: SH 39330 47726. Parish: Clynnog-fawr, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryngefailid (Field).
Grid Reference: SH 74433 56967. Parish: Capel Curig, Caernarfonshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cefn-y-gefail (Settlement).
Grid Reference: SN 78607 38014. Parish: Llanfair-ar-y-bryn, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Cwm y Gefail (Topographic feature).
Grid Reference: SN 78258 37426. Parish: Llanfair-ar-y-bryn, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Erw Gefail (Field).
Grid Reference: SJ 05608 77503. Parish: Cwm, Flintshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Erw Gefail (Field).
Grid Reference: SJ 05737 77536. Parish: Cwm, Flintshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Erw Gefail (Field).
Grid Reference: SJ 05698 77429. Parish: Cwm, Flintshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Gefail coch (Field).
Grid Reference: SH 60479 21913. Parish: Llanddwywe-is-y-graig, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin