Allt Ddôl-Walter (Unclassified).
Grid Reference: SN 45091 40486. Parish: Llandysul, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Allt-y-ddôl (Unclassified).
Grid Reference: SN 15355 41161. Parish: Llantood, Pembrokeshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Avon Dôl gam (Topographic feature).
Grid Reference: SH 68128 40837. Parish: Maentwrog, Merionethshire
When recorded: 1699. Primary Source: Parochialia 2. Secondary Source: none

Avon Dôlorkan (Topographic feature).
Grid Reference: SH 61994 35490. Parish: Llandecwyn, Merionethshire
When recorded: 1699. Primary Source: Parochialia 2. Secondary Source: none

Beudy Ty'n-y-ddôl (Unclassified).
Grid Reference: SH 57732 49450. Parish: Beddgelert, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Beudy'r Ddôl (Unclassified).
Grid Reference: SH 62276 49995. Parish: Beddgelert, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Blaen-ddôl (Settlement).
Grid Reference: SN 58894 40588. Parish: Pencarreg, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Blaen-ddôl (Unclassified).
Grid Reference: SH 92688 36309. Parish: Bala, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Blaen-ddôl (Settlement).
Grid Reference: SN 14993 37154. Parish: Eglwyswrw, Pembrokeshire
When recorded: 1827. Primary Source: Bishop's Transcripts. Secondary Source: Place-Names of Pembrokeshire

Blaen-ddôl (Unclassified).
Grid Reference: SH 70113 42468. Parish: Ffestiniog, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website