 Adding to the uncertainty, the genealogies of the Osraige themselves were subject to comprehensive rewriting in Cerball's time and immediately afterwards, attaching them to the Laigin of Leinster.It has been suggested that the importance of Cerball in Icelandic writings stems from the popularity of the Fragmentary Annals of Ireland among the Norse-Gaels of eleventh century Ireland, who passed these accounts on to the Icelanders, who then attached this famous and warlike king to their ancestry.Whether Cerball was in fact an ancestor of many prominent settler families is, however, of rather less importance than the fact that the Icelanders considered it worth reporting their descent from Cerball mac Dúnlainge, whether real or contrived.