Högne of Njardö

Gard Agdi (Old Norse Garðr Agði) appears in the legendary genealogies of Hversu Noregr byggdist as one of the three sons of Nór, the legendary first king of Norway, and as ruler and ancestor of rulers over southwestern Norway. The surname Agdi may refer to Agdir (Agðir), the southernmost region of Norway, represented today by the counties of Aust-Agder and Vest-Agder.

Gard was father of seven sons: Hörd (Hǫrðr), Rúgálf (Rúgálfr), Thrym (Þrymr), Végard (Végarðr), Freygard (Freygarðr), Thorgard (Þorgarðr), and Grjótgard (Grójtgarðr),

According to the Hversu, Hörd son of Gard, the eponym of Hördaland (the modern county of Hordaland) was father of Jöfur (Jǫfurr) or Jösur (Jǫsurr).

The Hversu goes on to say that Rúgálf son of Gard, the eponym of Rogaland, was father of Rögnvald (Rögnvaldr), the father of Ögvald (Ǫgvaldr) but gives no further descendants.

But Hálfs saga ok Hálfsrekka ('The saga of Half and his heroes'), brings in King Ögvald of Rogaland at its beginning (though making no mention of Ögvald's ancestry) and in this work it is Ögvald who is the father of Jösur.

The Hversu and the Hálf's saga do agree in their accounts of the descendants of Jösur. Jösur was father of King Hjör (Hjǫrr) who in the saga was king of both Hördaland and Rogaland. Hjör was father of Hjörleif the Ladies' Man (Hjǫrleifr inn kvensamr) who had three wives.

By Æsa the Fair, daughter of Jarl Eystein of Valdres, Hjörleif was father of Ótrygg (Ótryggr), the father of Óblaud (Óblauðr), the father of Högni the White (Hǫgni inn hvítr), the father of Úlf the Squinter (Úlfr inn skjálgr).

Hjörleif then also married Hild the Slender (Hildr in mjóva) daughter of Högni of Njardey (Njarðey 'Njörd's-Isle', modern Nærøy). By Hild the Slender Hjörleif was father of Hjörólf (Hjǫrólfr) and Hálf (Hálf), this last being the hero of the saga. According to the saga and the Landnámabók (2.19 and following), Hálf was father of Hjör who married Hagný daughter of Haki, son of Hámund (Hámundr). Their children were the twins Hámund Hellskin (Hámundr heljarskinn) and Geirmund Hellskin (Geirmundr heljarskinn). Geirmund Hellskin settled in Iceland with his kinsman Úlf the Squinter. The Landnámabók describes Geirmund as a war-king who had dominions in Rogaland but names a certain Sulki as the true king of Rogaland, as do other accounts. However Grettis saga ('Saga of Grettir') states that Hördaland belonged to Geirmund and that Sulki ruled only South Rogaland.

...
Wikipedia