étan

See also: etan, etán, and Etan

Old Irish

From Proto-Celtic *antonos, from Proto-Indo-European *h₂ent- (“forehead”).^[1] Related to Latin antiae (“forelocks”). Compare Proto-Germanic *andijaz (“end”) and *umbi (“around”).

étan m

Masculine o-stem
	Singular	Dual	Plural
Nominative	étan	étan^L	étain^L
Vocative	étain	étan^L	étanu^H
Accusative	étan^N	étan^L	étanu^H
Genitive	étain^L	étan	étan^N
Dative	étan^L	étanaib	étanaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

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

^ Matasović, Ranko (2009) “*antono-”, in Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, →ISBN, page 39