Bronllwyn House Yard Garden (Field).
Grid Reference: SJ 07534 81471. Parish: Gwaenysgor, Flintshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Capel Bronllwyn (Unclassified).
Grid Reference: ST 09746 82123. Parish: Pentyrch, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Coedcae ronllwyn (Field).
Grid Reference: SN 90876 14575. Parish: Ystradfellte, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cronllwyn (Unclassified).
Grid Reference: SM 98560 34885. Parish: Fishguard South, Pembrokeshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Cronllwyn Quarry (Disused) (Unclassified).
Grid Reference: SM 98310 35197. Parish: Llanllawer, Pembrokeshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Maes yr Onllwyn (Field).
Grid Reference: SJ 05227 23079. Parish: Hirnant, Montgomeryshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Onllwyn (Unclassified).
Grid Reference: SN 84095 10245. Parish: Dulais Higher, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Onllwyn (Field).
Grid Reference: SN 92938 20935. Parish: Senni, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Onllwyn (Field).
Grid Reference: SO 00114 09263. Parish: Penderyn, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Onllwyn (Unclassified).
Grid Reference: SH 48697 85978. Parish: Penrhosllugwy, Anglesey
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website