The spelling patterns of place-names therefore follow the standard spelling patterns of the Welsh language – as seen in action in A Dictionary of the Welsh Language and other standard publications.
Felly mae patrymau sillafu enwau lleoedd yn dilyn patrymau sillafu safonol yr iaith Gymraeg – fel y’i gwelir ar waith yng Ngeiriadur Prifysgol Cymru a chyhoeddiadau safonol eraill.