1) Berger of the Met 2) Berger of the opera 3) Diva Berger 4) English girl name 5) Estonian feminine given name 6) Feminine name in Berlin 7) Met soprano Berger 8) Singer Berger 9) Singer Sack 10) Soprano berger 11) Soprano Sack 
In Norse mythology according to the Eddic poem Rígsþula, Erna was the mother of eleven sons by Jarl, the ancestors of the class of warriors in Norse society. Her father was Hersir, a tribal chief. ...[moth] Erna is a genus of moths of the Noctuidae family. ...
Erna is a cultivated variety of potato.
a female given name: from an Old English word meaning “eagle.”