Allt Glyn-hyrddod (Topographic feature).
Grid Reference: SN 78948 34210. Parish: Llandingad Without, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryn yr Hyrddod (Unclassified).
Grid Reference: SN 80821 69173. Parish: Ysbyty Ystwyth, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryn yr Hyrddod (Unclassified).
Grid Reference: SH 77284 44516. Parish: Eidda, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryn-yr-hyrddod (Unclassified).
Grid Reference: SH 93214 46172. Parish: Llangwm, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Buarth yr hyrddod (Field).
Grid Reference: SH 95388 31107. Parish: Llanfor, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Carn yr Hyrddod (Unclassified).
Grid Reference: SN 78999 70351. Parish: Ysbyty Ystwyth, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Creigiau'r-hyrddod (Unclassified).
Grid Reference: SJ 13835 37812. Parish: Llansanffraid Glynceiriog, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Crtaig yr Hyrddod (Unclassified).
Grid Reference: SH 82407 37652. Parish: Llanycil, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Cwm yr Hyrddod (Unclassified).
Grid Reference: SH 60063 50973. Parish: Beddgelert, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Llwyn-yr-hyrddod (Unclassified).
Grid Reference: SO 03789 09624. Parish: Vaynor, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website