[Afon] Chamarch (Topographic feature).
Grid Reference: SN 90671 53549. Parish: Llanafan Fawr, Brecknockshire
When recorded: 1699. Primary Source: Parochialia 3. Secondary Source: none

Aber-marchnad (Unclassified).
Grid Reference: SH 50133 37887. Parish: Criccieth, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Cammarch (Unclassified).
Grid Reference: SN 92321 49059. Parish: Treflys, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Cammarch (Unclassified).
Grid Reference: SN 88812 55678. Parish: Llanfihangel Abergwesyn, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Cammarch (Unclassified).
Grid Reference: SN 91624 51837. Parish: Llanfihangel Abergwesyn, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Llammarch (Topographic feature).
Grid Reference: SN 50668 24778. Parish: Llanegwad, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Llammarch (Topographic feature).
Grid Reference: SN 50486 26119. Parish: Llanegwad, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Marchlyn-bach (Unclassified).
Grid Reference: SH 56102 62922. Parish: Llanddeiniolen, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Marchlyn-bâch (Unclassified).
Grid Reference: SH 59313 63369. Parish: Llanddeiniolen, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Marchlyn-mawr (Unclassified).
Grid Reference: SH 60414 63957. Parish: Llandygai, Caernarfonshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website