OriginBorrowed from English eider, from Swedish ejder, from Old Norse æðr, from Proto-Germanic *ēdrǭ, *ēþrǭ.
Formséadair(genitive, singular) · éadair(nominative, plural) · éadar(indefinite, nominative, singular) · éadair(indefinite, nominative, plural) · a éadair(indefinite, singular, vocative) · a éadara(indefinite, plural, vocative) · éadair(genitive, indefinite, singular) · éadar(genitive, indefinite, plural) · éadar(dative, indefinite, singular) · éadair(dative, indefinite, plural) · an t-éadar(definite, nominative, singular) · na héadair(definite, nominative, plural) · an éadair(definite, genitive, singular) · na n-éadar(definite, genitive, plural) · leis an éadar(dative, definite, singular) · don éadar(dative, definite, singular) · leis na héadair(dative, definite, plural) · éadar(error-unrecognized-form) · n-éadar(error-unrecognized-form) · héadar(error-unrecognized-form)
Source: Wiktionary — CC BY-SA 4.0