Hunter (2000) states that Ketill was "in charge of an extensive island realm and, as a result, sufficiently prestigious to contemplate the making of agreements and alliances with other princelings". However, Woolf (2007) suggests that the story of his failing to pay tax to Harald "looks very much like a story created in later days to legitimise Norwegian claims to sovereignty in the region" and some scholars believe that this entire story of Harald's expedition is apocryphal and based on the later voyages of
Magnus Barefoot. Although Norse military activity in Ireland in the 9th century is well documented in Irish sources, they contain no record at all of Harald Fairhair's voyage to the west. Furthermore, Harald is assumed to have annexed the
Northern Isles (comprising Orkney and Shetland) in 875 or later. If Ketill's suzerainty post-dates this time, it is hard to see how Thorstein the Red, an adult grandson of his, could have been active in the 870s and 880s. It is therefore likely that Ketill's
floruit in the Hebrides was at a period that pre-dates Harald's victory at Hafrsfjord.
Caittil Find Ketill Flatnose is also sometimes equated with
Caittil Find, a reported leader of the
Gallgáedil recorded in the
Annals of Ulster as fighting in Ireland in 857. This source states simply that "Ímar and Amlaíb inflicted a rout on Caittil the Fair and his Norse-Irish in the lands of Munster." (
Ímar and
Amlaíb are well-attested Norse leaders active in Ireland and the Isles in the 9th century.) The Ketill/Caittil relationship was first proposed by E. W. Robertson in 1862, and then rejected by
J. H. Todd in 1867. Robertson's position has since been supported by, among others,
W. F. Skene and
A. P. Smyth, and
Donnchadh Ó Corráin are more skeptical. In more recent scholarly debate, Clare Downham maintains scepticism on the link and also draws attention to a reference to 'Cetill' in Welsh chronicles in 844. The connection between the Ketill in Irish records and Norse sagas is described by
Woolf (2007) as "extremely tenuous", yet here Caittil is clearly the enemy of Amlaíb. • The Norse sources have Ketill's daughters Thorunn marrying Helgi
inn magri, a grandson of Cerball mac Dúnlainge, and Auðr marrying Olaf the White, both of whom were prominent figures in Ireland, suggesting significant connections between Ketill and the mid-9th century political landscape of that region. • An individual can have more than one nickname, and dynastic marriages do not always equate to friendship. They note the correspondence between the Gaelic name
Dál Riata and the fact that when Auðr, settled in the
Breiðafjörður region of western Iceland it was in a region called Dalir or Dalaland (modern
Dalasýsla). Examples include islands called Pjattland (Pictland) and Írland (Ireland) and the nearby Patreksfjörður and Trostansfjörður named in honour of two Celtic saints. Fraser (2009) has suggested that Little Dunagoil near Kingarth could have been the Dalriadan
Cenél Comgaill capital prior to the Norse incursions.
Catol The
Chronicum Scotorum refers to a battle that took place in 904 in which two grandsons of
Ímar and their ally "Catol" were victorious against "Aed" who was evidently a leader in either Ireland or
Pictland. It has been suggested that Catol was Ketill Flatnose (although once again the chronology is problematic), or alternatively that he was
Cadell ap Rhodri, a King of
Gwynedd. ==Portrayal==