Cae tyllau (Field).
Grid Reference: SH 39137 44433. Parish: Llanaelhaearn, Caernarfonshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae tyllau mwyn (Field).
Grid Reference: SN 69029 67833. Parish: Upper Lledrod, Cardiganshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Ffridd y Tyllau (Unclassified).
Grid Reference: SH 79412 33344. Parish: Llanuwchllyn, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Ffynnonau Tyllau-Glesyn (Unclassified).
Grid Reference: SS 92722 93212. Parish: Llangeinor, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Pen Tyllau-duon (Unclassified).
Grid Reference: SS 91027 91452. Parish: Llangeinor, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Twyn Tyllau-defaid (Unclassified).
Grid Reference: ST 00713 93336. Parish: Rhondda, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Tyllau (Unclassified).
Grid Reference: SS 90321 73077. Parish: St Brides Major, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Tyllau budron and Cottage, part (Field).
Grid Reference: SH 30927 35056. Parish: Buan, Caernarfonshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Tyllau Duon (Unclassified).
Grid Reference: SH 48033 92469. Parish: Llaneilian, Anglesey
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Tyllau Gro (Unclassified).
Grid Reference: SS 82259 79639. Parish: Newton Nottage, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website