- Éirinn (Cois Fharraige)
From Old Irish Ériu, from Proto-Celtic *ɸīwerjō (compare Middle Welsh Iwerd (“Irish Sea”)), from Proto-Indo-European *piHweryon-, likely related to *piHwer- (“fat”) (compare Ancient Greek πίειρα (píeira, “fertile”), Sanskrit पीवरी (pīvarī, “fat, rich”)).
Éire f (genitive Éireann)
- Ireland (both the island and the republic)
The definite article is used only in the genitive case. This is one of the few nouns in Irish with a distinct dative case in the standard language.
|Radical||Eclipsis||with h-prothesis||with t-prothesis|
|Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.