• Born: Abt 822
• Died: 873

  Research Notes:

rex Nordmannorum totius Hibernie & Brittanie

He followed his older brother Amlaíb Conung (Óláfr konungr), to Ireland, and levied the same tributes for the Irish in 852. He was of the Gall Gaeidhil, the Dano Irish of Leath Chuinn in 856. He sided with Cearbhall, lord of Osraighe, in which they gained a victory in the territory of Aradh Tire, over the Cinel Fiachach, with sixty-four hundred men, in 856. He was only known in the Irish Annals between 856 and 873. He joined with Cearbhall, lord of Osraighe, and his brother, Amhlaeibh, as they led a great army into Meath in 857 in Ireland. He joined with Cearbhall, lord of Osraighe, and his brother, Amhlaeibh, as they led a great army into Meath in 857 in Ireland.

Annals of Ulster 863: "The caves of Achad Aldai, and of Cnodba, and of Boadán's Mound above Dubad, and of Óengoba's wife, were searched by the foreigners—something which had never been done before. This was the occasion when three kings of the foreigners, i.e. Amlaíb and Ímar and Auisle, plundered the land of Flann son of Conaing; and Lorcán son of Cathal, king of Mide, was with them in this. / Uamh Achaidh Alddai & Cnodhbai & uam Fheirt Boadan os Dubadh & uam Mna Angobann ro scruidiset Gaill, quod antea non perfectum est, .i. a fecht ro slatsat .iii. righ Gall feronn Flaind m. Conaing, .i. Amhlaim & Ímhar & Auisle; & Lorcan m. Cathail leo occa, rí Mide."

He was leader, with his two brothers, of an enormous Danish army consisting of around ten thousand men in 866 in East Anglia, England. He was sacked York with his brothers after a fierce attack on the ancient city on 1 November 866.

Annals of Ulster 870: "The siege of Ail Cluaithe by the Norsemen: Amlaíb and Ímar, two kings of the Norsemen, laid siege to the fortress and at the end of four months they destroyed and plundered it. / Obsesio Ailech Cluathe a Norddmannis, .i. Amlaiph & Imhar, duo reges Norddmannorum obsederunt arcem illum & distruxerunt in fine .iiii. mensium arcem & predauerunt."

Annals of Ulster 871: "Amlaíb and Ímar returned to Áth Cliath from Alba with two hundred ships, bringing away with them in captivity to Ireland a great prey of Angles and Britons and Picts. / Amhlaiph & Ímar do thuidecht afrithisi du Ath Cliath a Albain dibh cetaibh long, & praeda maxima hominum Anglorum & Britonum & Pictorum deducta est secum ad Hiberniam in captiuitate."