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 hyphen is used when the Welsh definite article (y/yr) occurs before a final monosyllablic element; hyphens are used before and after the definite article in order to indicate the individual elements and aid pronunciation.