Rígsþula

Rígsþula (Old Norse = 'Lay of Rígr') is an Eddic lay from the Poetic Edda.

It tells about the god Rígr who came to earth and visited three childless couples with whom he stayed for three days each and who conceive children as a result:

Ái and Edda: A son named Þræll - his children by his wife Þír are 12 sons (Hreimr, Fjósnir, Klúrr, Kleggi, Kefsir, Fúlnir, Drumbr, Digraldi, Dröttr, Hösvir, Lútr, Leggjaldi) and 9 daughters (Drumba, Kumba, Ökkvinkalfa, Arinnefja, Ysja, Ambátt, Eikintjasna, Tötrughypja, Trönubeina)

Afi and Amma: A son named Karl - his children by his wife Snør are 12 sons (Halr, Drengr, Hölðr, Þegn, Smiðr, Breiðr, Bóndi, Bundinskeggi, Búi, Boddi, Brattskeggr, Seggr) and 10 daughters (Snót, Brúðr, Svanni, Svarri, Sprakki, Fljóð, Sprund, Víf, Feima, Ristill)

Faðir and Móðir: A son named Jarl - his children by his wife Erna are 12 sons (Burr, Barn, Jóð, Aðal, Arfi, Mögr, Niðr, Niðjungr, Sonr, Sveinn, Kundr, Konr)