Völsunga saga
Gudrún bore to Sigurd a son named Sigmund according to the "Völsunga saga", presumably the same as the unnamed son mentioned in stanza 5 of "Sigurdarkvida hin skamma". But nothing more is said of him. More often mentioned is Gudrún's daughter named Svanhild ("Svanhildr") who became the wife of Jörmunrek ("Jǫrmunrekr"). By her third husband Jónakr, Gudrún is mother of Hamdir ("Hamðir") and Sörli ("Sǫrli"). In the eddic poems "Guðrúnarhvöt" and "Hamðismál", Erp ("Erpr"), a third son of Jónakr, was born by a different mother. But in the "Skáldskaparmál" and the "Völsunga saga" Erp is also a son of Gudrún.