Notes
The standard reference book, A Gazetteer of Welsh Place-Names (University of Wales Press, 1967) uses tyn (without an apostrophe) for the contracted form of the Welsh noun tyddyn (homestead or smallholding).

The standard reference book, A Gazetteer of Welsh Place-Names (University of Wales Press, 1967) uses tyn (without an apostrophe) for the contracted form of the Welsh noun tyddyn (homestead or smallholding).