Allt Troed-y-rhiw-bylchau (Unclassified).
Grid Reference: SN 75208 46511. Parish: Cilycwm, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

BYLCHAU (Unclassified).
Grid Reference: SH 99208 64996. Parish: Bylchau, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau (Unclassified).
Grid Reference: SH 57153 06153. Parish: Llangelynin, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau (Unclassified).
Grid Reference: SH 97386 62894. Parish: Bylchau, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau (Unclassified).
Grid Reference: SN 86939 72643. Parish: Llansantffraed Cwmdeuddwr, Radnorshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau (Unclassified).
Grid Reference: SO 11713 58473. Parish: Bettws Disserth, Radnorshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau (Unclassified). Variant of head-name Bylchau / Bylchau
Grid Reference: SH 97600 62900. Parish: Bylchau, Denbighshire
When recorded: 1795. Primary Source: none. Secondary Source: DPNW

Bylchau (Unclassified).
Grid Reference: SN 84418 43698. Parish: Llanwrtyd Without, Brecknockshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau Blaen-Clydach (Unclassified).
Grid Reference: SN 80400 26801. Parish: Llanddeusant, Carmarthenshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bylchau Bychain (Unclassified).
Grid Reference: SH 95967 33982. Parish: Llanfor, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website