Allt diffwys (Field).
Grid Reference: SN 95882 81050. Parish: Llangurig, Montgomeryshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Coed Graig-y-diffwys (Unclassified).
Grid Reference: SN 93783 96859. Parish: Carno, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Craig y Diffwys (Unclassified).
Grid Reference: SN 93889 96904. Parish: Carno, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Cwm Diffwys (Unclassified).
Grid Reference: SO 00847 81417. Parish: Llandinam, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Diffwys (Unclassified).
Grid Reference: SN 73199 57757. Parish: Caron-is-clawdd, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Diffwys (Unclassified).
Grid Reference: SH 74891 66310. Parish: Dolgarrog, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Diffwys (Unclassified).
Grid Reference: SJ 02401 57586. Parish: Llanrhaeadr-yng-Nghinmeirch, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Glyn Diffwys (Topographic feature).
Grid Reference: SH 86210 75021. Parish: Llanelian-yn-Rhôs, Denbighshire
When recorded: 1699. Primary Source: Parochialia 1. Secondary Source: none

Glyn Diffwys (Topographic feature).
Grid Reference: SH 99263 44252. Parish: Llangwm, Denbighshire
When recorded: 1699. Primary Source: Parochialia 2. Secondary Source: none

Glyn diffwys (Field).
Grid Reference: SH 99377 44289. Parish: Llangwm, Denbighshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin