^ Rulers with names in italics are considered fictional ^ Mackenzie, E; Ross, M (1834).An Historical, Topographical, and Descriptive View of the County Palatine of Durham . Vol. I. Newcastle upon Tyne: Mackenzie and Dent. p. xi. Retrieved28 February 2012 . ^ Downham, Clare (2007),Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014 , Edinburgh: Dunedin,ISBN 978-1-903765-89-0 ,OCLC 163618313 ^ Woolf, Alex (2007),From Pictland to Alba, 789–1070 , The New Edinburgh History of Scotland, Edinburgh: Edinburgh University Press,ISBN 978-0-7486-1234-5 ,OCLC 123113911 ^ Zaluckyj, Sarah & Feryok, Marge.Mercia: The Anglo-Saxon Kingdom of Central England (2001)ISBN 1-873827-62-8 ^ Barbara Yorke (1995),Wessex in the early Middle Ages , A & C Black,ISBN 071851856X ; pp79 -83; table p.81 ^ Kelly, S. E. (2004)."Kings of the South Saxons (act. 477–772)" .Oxford Dictionary of National Biography (online ed.). Oxford University Press.doi :10.1093/ref:odnb/52344 . Retrieved3 February 2017 . (Subscription,Wikipedia Library access orUK public library membership required.) ^ Keynes, Simon (2014). "Appendix I: Rulers of the English, c.450–1066". InLapidge, Michael (ed.).The Wiley-Blackwell Encyclopedia of Anglo-Saxon England . Chichester: John Wiley & Sons.ISBN 978-0-470-65632-7 .^ Kirby, D. P.The Earliest English Kings . London and New York: Routledge.ISBN 978-0-4152-4211-0 . ^ Lapidge, M.; et al., eds. (1999)."Kings of the East Angles" .The Blackwell Encyclopedia of Anglo-Saxon England . London: Blackwell.ISBN 978-0-6312-2492-1 . ^ Searle, W. G. 1899.Anglo-Saxon Bishops, Kings and Nobles. ^ Yorke, B. 1990.Kings and Kingdoms of Early Anglo-Saxon England .^ Carpenter, Clive.Kings, Rulers and Statesmen . Guinness Superlatives, Ltd. ^ Ross, Martha.Rulers and Governments of the World , Vol. 1.Earliest Times to 1491 . ^ Ashley, Michael (1998).British Monarchs: the Complete Genealogy, Gazetteer, and Biographical Encyclopedia of the Kings & Queens of Britain . London: Robinson.ISBN 978-1-8548-7504-4 .