Pen-celli Quarries (Disused) (Unclassified).
Grid Reference: SN 19222 27875. Parish: Cilymaenllwyd, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Pencellivor (Settlement).
Grid Reference: SN 12973 40116. Parish: Eglwyswrw, Pembrokeshire
When recorded: 1595. Primary Source: Bronwydd Collection. Secondary Source: Place-Names of Pembrokeshire

Piece above Cellin (Field).
Grid Reference: SO 01532 65049. Parish: Nantmel, Radnorshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Plantation Cwm-celli-fâch (Topographic feature).
Grid Reference: SN 54851 27242. Parish: Llanfynydd, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Plantation Cwm-celli-uchaf (Topographic feature).
Grid Reference: SN 54830 27710. Parish: Llanfynydd, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Public house &c in Pencelli Village (Field).
Grid Reference: SO 09311 24990. Parish: Llanfeugan, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

St. Marcellus & St. Marcellinus's Church (Unclassified).
Grid Reference: SH 34389 85310. Parish: Llanddeusant, Anglesey
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Tycellin House and Garden (Field).
Grid Reference: SO 10055 34887. Parish: Llandefalle, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Upper Celliau (Unclassified).
Grid Reference: SO 36904 21153. Parish: Grosmont Fawr, Monmouthshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Wain cellin (Field).
Grid Reference: SO 10124 42584. Parish: Crickadarn, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin