Beili-bedw Mawn Pool (Unclassified).
Grid Reference: SO 16219 56569. Parish: Llanfihangel-Nant-Melan, Radnorshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Blaen-heath Mawn Pool (Unclassified).
Grid Reference: SO 16383 55014. Parish: Colva, Radnorshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryn Mawndy (Field).
Grid Reference: SJ 03663 48274. Parish: Bettws Gwerfil Goch, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Bryn Mawndy House, garden and outbuildings (Field).
Grid Reference: SJ 03648 48111. Parish: Bettws Gwerfil Goch, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Bryn y mawn (Field).
Grid Reference: SJ 01880 47698. Parish: Bettws Gwerfil Goch, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Bryn y mawndy (Settlement).
Grid Reference: SJ 03476 48128. Parish: Bettws Gwerfil Goch, Merionethshire
When recorded: 1699. Primary Source: Parochialia 2. Secondary Source: none

Bryn y mawndy (Field).
Grid Reference: SJ 05052 45289. Parish: Corwen, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Brynb mawnog (Field).
Grid Reference: SH 90645 42738. Parish: Llanfor, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Bryn-y-mawn (Unclassified).
Grid Reference: SJ 21045 69956. Parish: Northop, Flintshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bwlch y Mawn (Topographic feature).
Grid Reference: SH 91865 48256. Parish: Cerrigydrudion, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website