[2] _Annals of the Four Masters_, A.D. 807.
[3] _Annals of Ulster_, A.D. 811, 820-824, 827, 830.
[4] Some writers would identify Turgeis with Thorgils, son of Harold Fairhair, who with his brother Frothi went on a viking expedition to Ireland. They captured Dublin, and Thorgils reigned there for a long time as king. In the end, however, he was betrayed by the Irish and was killed. (_Heimskringla: Haralds saga hins hárfagra_, ch. 35.)
This account of Thorgils certainly bears a resemblance to that of Turgeis contained in the Irish chronicles and Giraldus Cambrensis (cf. Todd: Introduction to _War of the Gaedhil with the Gaill_, I., ii.), but it is of course incorrect to say that Turgeis was a son of Harold Fairhair.
[6] _War of the Gaedhil with the Gaill_, p. 13.
[8] The Irish chroniclers use a variety of names for the Scandinavians: _Dibearccai_ (outlaws), _Gaill_ (foreigners), _Gennti_ (Gentiles), and _Pagánaigh_ (Pagans). They also distinguish between Danes and Norsemen. The Danes were known as _Danair_, _Danmarcaigh_, _Dubh Gennti_ (Black Gentiles), and _Dubh-Gaill_. The word _Dubh-Gaill_ (Black Foreigners) still survives in the personal names _Doyle_ and _MacDowell_ and in the place-name _Baldoyle_. The Norsemen were called _Finn-Gaill_ (Fair Foreigners), _Finn-Genti_, _Nortmannai_ (Lat. Northmanni) and _Lochlannaigh_ (_i.e._, men of _Lochlann_ or Norway).
[9] _Annals of Ulster_, A.D. 851 (= 852).
[10] _Three Fragments of Annals_, p. 127.
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.
[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).