Ragnall ua Ímair (bahasa Nordik Kuno: Rögnvaldrcode: non is deprecated , wafat 921) atau Rægnald adalah seorang pemimpin Viking yang memerintah Northumbria dan Isle of Man pada awal abad ke-10. Ia adalah cucu dari Ímar dan anggota Uí Ímair.

• Thorpe, B, ed. (1861). The Anglo-Saxon Chronicle. Rerum Britannicarum Medii Ævi Scriptores. Vol. Vol. 1. London: Longman, Green, Longman, and Roberts. Accessed via Internet Archive.
• Williams Ab Ithel, J, ed. (1860). Annales Cambriae. Rerum Britannicarum Medii Ævi Scriptores. London: Longman, Green, Longman, and Roberts. Accessed via Internet Archive.
• "Annals of the Four Masters". Corpus of Electronic Texts (Edisi 16 December 2013). University College Cork. 2013. Diakses tanggal 23 November 2014.
• "The Annals of Ulster". Corpus of Electronic Texts (Edisi 15 August 2012). University College Cork. 2012. Diakses tanggal 23 November 2014.
• Dumville, D. N. (2005). Brenhinoedd y Saeson, 'The Kings of the English', A.D. 682–954: Texts P, R, S in Parallel. University of Aberdeen.
• Williams Ab Ithel, J, ed. (1860). Brut y Tywysigion; or, The Chronicle of the Princes. Rerum Britannicarum Medii Ævi Scriptores. London: Longman, Green, Longman, and Roberts. Accessed via Internet Archive.
• "Chronicon Scotorum". Corpus of Electronic Texts (Edisi 24 March 2010). University College Cork. 2010. Diakses tanggal 26 November 2014.
• "Fragmentary Annals of Ireland". Corpus of Electronic Texts (Edisi 5 September 2008). University College Cork. 2008. Diakses tanggal 29 November 2014.

• Ashley, Mike (7 June 2012). The Mammoth Book of British Kings and Queens. Little, Brown Book Group. ISBN 978-1-4721-0113-6.
• Downham, Clare (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN 978-1-903765-89-0.
• Forte, Angelo; Oram, Richard D.; Pedersen, Frederik (5 May 2005). Viking Empires. Cambridge University Press. ISBN 978-0-521-82992-2.
• Hart, Cyril (2004). "Ragnall (d. 920/21)". Oxford Dictionary of National Biography. Oxford University Press. doi:10.1093/ref:odnb/49264. Diakses tanggal 20 May 2015. Subscription or UK public library membership Diarsipkan 2013-04-29 di Wayback Machine. required.
• Holman, Katherine (2007). The Northern Conquest: Vikings in Britain and Ireland. Signal Books. ISBN 978-1-904955-34-4.
• Medieval Dublin. Vol. 6. Four Courts Press. 2005.
• Radner, Joan. "Writing history: Early Irish historiography and the significance of form" (PDF). Celtica. 23: 312–325. Diarsipkan dari asli (PDF) tanggal 23 September 2015.
• Sawyer, Peter (January 2001). The Oxford Illustrated History of the Vikings. Oxford University Press. ISBN 978-0-19-285434-6.
• Woolf, Alex (2007). From Pictland to Alba: 789 – 1070. Edinburgh University Press. ISBN 978-0-7486-1234-5.

• Ragnald 1 di Prosopography of Anglo-Saxon England
• CELT: Corpus of Electronic Texts at University College Cork. The Corpus of Electronic Texts includes the Annals of Ulster and the Four Masters, the Chronicon Scotorum and the Book of Leinster as well as Genealogies, and various Saints' Lives. Most are translated into English, or translations are in progress.