Standardised Welsh Place-names list
Notes
This is the form recommended in the national standard reference work, A Gazetteer of Welsh Place-Names (University of Wales Press, 1967). One should not deviate from its recommendations without good reason.
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).