Lecan. This section, specifically focused on the pedigrees and doings of the Norse families of Ireland, was still in existence in the 17th century, as reported by Mac Firbis himself, but has since become lost. Later Mann and the Isles Crovan dynasty Descendants of the Dublin Uí Ímair most likely persisted into the 13th century in the line of Godred Crovan, King of Dublin and King of Mann and the Isles, even though his ancestry is not completely agreed upon. He was most likely the grandson of Ímar mac Arailt above, one of the last certain Uí Ímair kings of Dublin and a grandson of Amlaíb Cuarán. Godred's descendants, although vassals of the Kings of Norway, continued to rule into the 1260s, the last being Magnús Óláfsson (to 1265), or briefly his son Guðrøðr (1275). Clann Somhairle Although their descent from Godred Crovan is through the female line, Alex Woolf believes the Clann Somhairle (Clan Donald and Clan MacDougall) or the Lords of the Isles can be regarded as a "cadet branch" of the Uí Ímair, as they apparently based their claim to the Isles on this descent (according to Woolf). Their founder Somerled married Ragnhild, daughter of Olafr Godredsson, King of Mann and the Isles and son of Godred Crovan. This of course assumes these dynasts belonged to the Uí Ímair. Sir Iain Moncreiffe attempted to reconstruct a male line descent from Echmarcach mac Ragnaill himself to Somerled, but Peter Kurrild-Klitgaard has demonstrated that the proposed line is problematic in several respects. Gwynedd Amlaíb mac Sitriuc (Ólafr son of Sigtrygg Silkbeard, King of Dublin) became an ancestor of the Kings of Gwynedd through his daughter Ragnhild, wife of Cynan ab Iago and mother of the famous Gruffudd ap Cynan. See also Scandinavian York Kingdom of Dublin Norse–Gaels Notes References Downham, Clare (2004). "Eric Bloodaxe - axed? The Mystery of the Last Viking King of York", in Mediaeval Scandinavia 1: 51–77. Downham, Clare (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. Forte, Angelo, Richard Oram, & Frederik Pedersen (2005). Viking Empires. Cambridge: U. P. . Holman, Katherine (2007). The Northern Conquest: Vikings in Britain and Ireland. Signal Books Hudson, Benjamin T. (2005). Viking Pirates and Christian Princes: Dynasty, Religion, and Empire in the North Atlantic. Oxford Kurrild-Klitgaard, Peter (2022). "Second thoughts on Moncreiffe's theory of the origin of the 'Galley