Aber-bidan (Unclassified).
Grid Reference: SO 26016 14603. Parish: Llanelly, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Aber-bidan Farm (Unclassified).
Grid Reference: SO 25793 14786. Parish: Llanelly, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Bidn (Unclassified).
Grid Reference: SN 86332 83257. Parish: Llangurig, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Bidno (Unclassified).
Grid Reference: SN 84317 84825. Parish: Llangurig, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Bidno (Unclassified).
Grid Reference: SN 83888 85752. Parish: Llangurig, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Bidno (Unclassified).
Grid Reference: SN 88031 81456. Parish: Llangurig, Montgomeryshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Allt Maes-y-bidie (Topographic feature).
Grid Reference: SN 56104 32917. Parish: Llanybyther, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Betus Bidouth (Unclassified). Variant of head-name Dihewyd / Dihewyd
Grid Reference: SN 48300 56200. Parish: Dihewyd, Cardiganshire
When recorded: 1299. Primary Source: CalPR. Secondary Source: IW

Bidaren (Unclassified).
Grid Reference: SN 52198 60586. Parish: Cilcennin, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Biddallt (Field).
Grid Reference: SO 10453 21780. Parish: Llanfeugan, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin