Ardd twynissaf (Field).
Grid Reference: SN 61540 05353. Parish: Llandeilo Tal-y-bont, Glamorgan
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Graig Ardd twynissaf (Field).
Grid Reference: SN 61539 05305. Parish: Llandeilo Tal-y-bont, Glamorgan
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Morfa Twyni &c (Field).
Grid Reference: SN 60858 93622. Parish: Borth, Cardiganshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Morfa Twyni &c (Field).
Grid Reference: SN 60858 93622. Parish: Borth, Cardiganshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Pen-twyni (Unclassified).
Grid Reference: ST 23031 80734. Parish: St Mellons, Monmouthshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Pentwynissaf (Field).
Grid Reference: SN 58884 01904. Parish: Llandeilo Tal-y-bont, Glamorgan
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Pentwynissaf (Field).
Grid Reference: SN 58909 01820. Parish: Llandeilo Tal-y-bont, Glamorgan
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Twyni Bâch (Unclassified).
Grid Reference: SN 60657 94389. Parish: Borth, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Twyni Gleision (Unclassified).
Grid Reference: ST 14588 78297. Parish: Cardiff, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Twyni Mawr (Unclassified).
Grid Reference: SN 60595 93642. Parish: Borth, Cardiganshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website