Ériu

Old Irish

Alternative forms

• Hériu

Etymology

From Proto-Celtic *Φīweryū, from Proto-Indo-European *piHweryon-, from *piHwer- (“fat”).

Various connections to Proto-Indo-Iranian *áryas have also been hypothesized.

Proper noun

Ériu f

1. Ireland

   Synonyms: Banba, Elg, Fódla

Declension

Feminine n-stem
	Singular	Dual	Plural
Nominative	Ériu	—	—
Vocative		—	—
Accusative	ÉrinnN, ÉirinnN	—	—
Genitive	Érenn, Éirenn	—	—
Dative	ÉrinnL, ÉirinnL	—	—
Initial mutations of a following adjective: H = triggers aspiration L = triggers lenition N = triggers nasalization

Derived terms

• Érennach (“Irish”)

Descendants

• Irish: Éire
• Manx: Nerin
• Scottish Gaelic: Èirinn

Mutation

Old Irish mutation
Radical	Lenition	Nasalization
Ériu (pronounced with /h/ in h-prothesis environments)	unchanged	nÉriu
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.