Standard Welsh Place-names
Notes
This form is recommended on the basis of evidence of usage, despite it not being the form recommended in A Gazetteer of Welsh Place-Names (University of Wales Press, 1967).
The hyphen is used when a preposition (yn/ym/ar) occurs between two other elements. In such names hyphens are used before and after the preposition in order to highlight the individual elements and ensure correct pronunciation.
Proper nouns are usually capitalised when they are preceded by a definite article or preposition. Rhos here refers to the commote and not to a general 'rhos' or moor; therefore the name should be capitalised as it follows the Welsh preposition yn (English: in).
