The Welsh Language Commissioner is responsible for advising on the standard forms of Welsh place-names.
The Commissioner can give advice to individuals and organizations of all kinds, and has convened the Place-names Standardization Panel to provide expert advice and recommendations in this field. In forming its recommendations the panel will consider the meaning, history and etymology of place-names, as well as their usage. It also follows specific standardization guidelines
To find the standard form of Welsh place-names email firstname.lastname@example.org