Vogt (Dublin som Norsk By, p. 66) suggests that Olaf was related to Turgeis, the first Norse King of Ireland, and to Earl Tomrair (O.N. Thórarr), “tanist of the King of Lochlann,” who fell in the battle of Scaith Neachtain (847). On the other hand it may be noted here that the Annalist errs in making Olaf a brother of Ivarr the Boneless.
[11] Annals of Ulster, A.D. 870.
[12] Three Fragments of Annals, p. 195. The Landnámabók, II., ch. 15 says that “Olaf fell in battle in Ireland,” but this is surely a mistake.
[13] Annals of Ulster, sub anno, 872 (= 873).
[14] Cf. War of the Gaedhil with the Gaill, p. 27. Cf. also the entries in the Annals of Ulster:
“Ruaidhri, son of Muirmenn King of the Britons came to Ireland, fleeing before the Black Foreigners” (an. 876).
“The shrine of Colum-Cille and all his relics were brought to Ireland to escape the Foreigners” (an. 877).
[15] The War of the Gaedhil with the Gaill (p. 27) mentions another battle between Fair and Black Gentiles, in which many of the latter were killed.
[16] It is extremely difficult to identify these two princes owing to the similarity between their names. It has been suggested that Sighfrith is the Siefredus or Sievert who ruled jointly with Guthred-Cnut (d. c. 894) as King of Northumbria, while Sitriucc son of Ivarr is probably the “Sitric comes” whose name appears on a coin dating from this period. (See A. Mawer: The Scandinavian Kingdom of Northumbria, pp. 11-13. Saga-book of the Viking Club, VII. Part I.)
[17] Annals of Ulster, A.D. 916.