[Afon] Geirw (Topographic feature).
Grid Reference: SH 88618 47138. Parish: Cerrigydrudion, Denbighshire
When recorded: 1699. Primary Source: Parochialia 1. Secondary Source: none

Bryn Geirw (Unclassified).
Grid Reference: SH 77004 29017. Parish: Llanfachreth, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Brynia Geirwen House and bank (Field).
Grid Reference: SH 24095 80847. Parish: Holyhead Rural, Anglesey
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Bryniau-geirwon (Unclassified).
Grid Reference: SH 23946 80885. Parish: Holyhead Rural, Anglesey
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Capel Aber-Geirw (Unclassified).
Grid Reference: SH 76718 28999. Parish: Llanfachreth, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Coed Casa`-geirwon (Unclassified).
Grid Reference: ST 13229 71977. Parish: St Andrews Major, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Geirwen (Field).
Grid Reference: SH 47123 54311. Parish: Llandwrog, Caernarfonshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Geirwen (Field).
Grid Reference: SH 47123 54311. Parish: Llandwrog, Caernarfonshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Gweirgloddiau geirwon (Field).
Grid Reference: SH 69859 35814. Parish: Trawsfynydd, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Pont Aber-Geirw (Unclassified).
Grid Reference: SH 76739 29112. Parish: Trawsfynydd, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website