Note 49 — Chapter II · The Kingdom of Scotland—843–900.
Reading edition
Chron. Sax. 875. Halfdan was a brother of Ivar. According to Sim. Dun. Hist. Dun., l. 2, c. 13, he was driven from Northumbria very soon after he settled there, and perished miserably, slain by “his own people.” He was probably the Albdan Toshach of the Dugall, who was killed in battle by the Fingall in 877 at Loch Cuan, or Strangford Lough. An. Ult. 876.