One possibility is that Suibne, as King of the "Gall Gaidheil", was personally responsible for the conquest of western maritime region of the Cumbrians. In fact, the "Annals of Tigernach" record a ravaging inflicted upon Britons in 1030 by both the "Gaill" of Dublin and the English. Since this violent episode receives no corroboration from English and Welsh sources, such as the ninth- to twelfth-century "Anglo-Saxon Chronicle" and the eleventh- to thirteenth-century "Annales Cambriæ", it is possible that the recorded attack relates to the Cumbrians rather than the Welsh. The claim by "Historia Gruffud vab Kenan"—that Sitriuc's son held power in the Rhinns amongst other regions—could be further evidence that the Cumbrians suffered from attacks by the Dubliners. Such incursions could well have been coordinated with the "Gall Gaidheil". Alternately, if Suibne and Máel Coluim were indeed brothers, another possibility is that Suibne's title is evidence that Máel Coluim mac Cináeda seized upon the vacated Cumbrian kingship and installed Suibne as king over the Cumbrians. Such a move may explain the Scots' failure to immediately exploit their victory over the Northumbrians, and could indicate that Máel Coluim's resources were instead projected against the vulnerable Cumbrian realm.