The uncertainty surrounding Gofraid mac Sitriuc's parentage means that he could have been a member of any of several families. One such family—that of the kings Sitriuc mac Amlaíb and Glún Iairn—descended from
Amlaíb Cúarán, King of Northumbria and Dublin. Another family was that of Echmarcach mac Ragnaill, a man whose parentage is uncertain. Whilst Echmarcach's family forged an alliance with the Uí Briain kindred, Diarmait—a bitter opponent of both Echmarcach and
Donnchad mac Briain, King of Munster—appears to have cooperated with the descendants of Amlaíb Cúarán. In consequence, there are important implications in regard to Gofraid mac Sitriuc's familial identification.
As a descendant of Amlaíb Cúarán In 1066,
Haraldr Sigurðarson, King of Norway embarked upon an ill-fated invasion of England. Unfortunately for the Norwegians, their forces were utterly destroyed by the English in the subsequent
Battle of Stamford Bridge. It was in the aftermath of this defeat that the
Chronicle of Mann first makes note of Gofraid mac Sitriuc, and his ultimate successor,
Gofraid Crobán. Specifically, this source states that, following the latter's flight from the slaughter at Stamford, Gofraid mac Sitriuc honourably received him, and granted him sanctuary. If Gofraid mac Sitriuc was indeed a descendant of Amlaíb Cúarán, his generosity towards Gofraid Crobán may have been conducted in the context of interfamily fellowship, since the latter could have been a descendant of Amlaíb Cúarán as well. In fact, Gofraid mac Sitriuc's apparent descent from Amlaíb Cúarán would also explain the circumstances surrounding his accession to the kingship of the Isles. The unlikelihood that Diarmait would have allowed a member of Echmarcach's family to continue to reign in the Isles suggests that Diarmait may have installed a descendant of Amlaíb Cúarán—in this case Gofraid mac Sitriuc—as his client in the Isles. The latter seems to have been not only a descendant of Amlaíb Cúarán, uncle, or brother. According to the
Chronicle of Mann, Gofraid mac Sitriuc died in about 1070, and was succeeded by his son, Fingal, a man who may have ruled for as long as nine years. In 1073, a year after Toirdelbach's seizure of Dublin, Fingal evidently repulsed an Irish-based invasion of Mann. The incursion is recorded by the
Annals of Loch Cé and the
Annals of Ulster, the latter of which states that the expedition was led by a certain Sigtryggr Óláfsson and two grandsons of
Brian Bóruma, High King of Ireland. The precise identity of these three slain raiders is uncertain, as are the circumstances of the expedition itself. It is very likely, however, that the incursion was closely connected to the Uí Briain takeover of Dublin in the wake of Diarmait's death the year before. There is reason to suspect that Sigtryggr was a member of Echmarcach's family, perhaps a brother of Gofraid ua Ragnaill himself. It is further possible that this family also included Donnchad's wife,
Cacht ingen Ragnaill. Certainly, Echmarcach's daughter, Mór, married Toirdelbach's son, Tadc.
As a kinsman of Echmarcach If Gofraid mac Sitriuc is instead identical to Gofraid ua Ragnaill, and thus an apparent member of Echmarcach's family, it could mean that Gofraid ua Ragnaill had succeeded Echmarcach in Dublin and the Isles. This identification could mean that Sigtryggr—slain in the ill-fated invasion of Mann in 1073—was a descendant of Amlaíb Cúarán rather than a member of Echmarcach's family. In any case, numerous
Irish annals report that two years after the assault on Mann, Gofraid ua Ragnaill's reign and life came to an end, with the
Annals of Inisfallen recording that Toirdelbach banished Gofraid ua Ragnaill from Dublin altogether, and further stating that he died "beyond the sea", having assembled a "great fleet" to come to Ireland. If Gofraid mac Sitriuc and Gofraid ua Ragnaill are indeed identical, this annal-entry could be evidence that Toirdelbach ousted Gofraid ua Ragnaill from Dublin after failing to force him from Mann. If correct, this annal-entry could also be evidence that Gofraid ua Ragnaill fell back to Mann after his expulsion from Dublin, and attempted to assemble a fleet of Islesmen there before his death. ==Fingal and Gofraid Crobán==