Raghild "Hild" Nefja was not the mother of Hallad, he was the illegitimate son of Ragnvald, no records exist of his mother. In the Orkney saga, the brothers Einar, Hallad (Haddad) and Ivar are referred to as "frillesønner", sons of a frille (=literally mistress, or partner - "concubine" is not a good term for Nordic countries). Whether Ragnvald's four illegitimate sons Einar, Hrollaug, Hallad and Ivar had the same mother is not known, but highly unlikely.

From Harald Hårfagres (Fairhair) saga: "Earl Ragnvald was King Harald's dearest friend, and the king had the greatest regard for him. He was married to Hild, a daughter of Rolf Nefia, and their sons were Rolf and Thorer. Earl Ragnvald had also three sons by concubines, -- the one called Hallad, the second Einar, the third Hrollaug; and all three were grown men when their brothers born in marriage were still children Rolf became a great viking, and was of so stout a growth that no horse could carry him, and wheresoever he went he must go on foot; and therefore he was called Rolf Ganger.

-------------------- Hallad var frillesønn. -------------------- Hallad Ragnvaldsson, Earl of Orkney (1) M, #104783 Last Edited=28 Oct 2002

    Hallad Ragnvaldsson, Earl of Orkney is the son of Ragnvald I 'the Wise' Eysteinsson, Earl of More and Groa (?). (1)
    Hallad Ragnvaldsson, Earl of Orkney was also known as Earl of Orkney. (1)

Forrás / Source: http://www.thepeerage.com/p10479.htm#i104783 -------------------- He returned to norway where he died, having abandoned his Jarldom of Orkney -------------------- Jarl på Møre. 4th Jarl over Orknøyane frå 883-885 AD. Gav jarledømet til broren Einar i 885.