Lofdungs :
Lofdi was a great king who raided Reidgotaland (Reiðgotaland) and became king there. Lofdi's sons were Skekkil Sea-king (Skekkill sækonungr) and Skyli. Skyli was father of Egdir (Egðir), the father of Hjálmthér (Hjálmþér), the father of Eylimi, the father of Hjördís (Hjǫrdís), the mother of Sigurd Fáfnir's-bane, father of Áslaug (Áslaugr) by Brynhild whose ancestry appears below in the Budling discussion. This Áslaug was a wife of Ragnar Lodbrok and by him the mother of Sigurd Snake-in-the-Eye (Sigurðr ormr í auga) who was father of a second Áslaug who was mother of Sigurd Hart. Sigurd Hart was father of Ragnhild (Ragnhildr), mother of Harald Fairhair as already stated.
[source Wikipedia http://en.wikipedia.org/wiki/Halfdan_the_Old]