Eirin
eirin f (singulative eirinen)
From Proto-Celtic *agrinyā, plural of *agrinyom (compare Cornish yryn, Breton irin, Irish airne (“sloe”)), from a derivative of Proto-Indo-European *h₂ógeh₂ (“berry”) (compare Tocharian B oko (“fruit”), Old Church Slavonic агода (agoda, “berry”)).