Eirik (Erik): den altid mægtige.  (Oldnorsk Eirikr.  Ei: altid.  Rik: mægtige). (Norske døbenavne, med deres betydning og oprindelse, Støylen, 1887).

... The first syllable is that which we call aye to the present day, the word that lies at the root of the Latin œvum, the German ewig, and our own ever.  The second syllable is from the same source as ragn; it is he who executes judgment, the ruler or king, the same word as the Indian rajah, and the Latin rex.  It was reiks in Gothic, rich in old German, ryce in Anglo-Saxon.  Ei-rik is thus Ever King. (History of Christian Names, Yonge, 1884)

... In front of the standards of the host of Ivar stood Adils the Gay, from Upsalir; he was not in the Fylkings.  With him were the champions Sigvaldi, who had come with eleven ships; Tryggvy and Tvividil, each of whom had come with twelve dragon-ships; Lœsir, who had only one skeid, a most beautiful and formidable craft, entirely manned by berserks; Eirik, from Helsing, who had come with a large dragon-ship, manned also by berserks... (Ivar the Viking, Chaillu, 1893)