In the 1070s, Guðrøðr Crovan secured the kingship of the Isles through his conquest of Mann, and forcefully added Dublin to his realm in about 1091.
Guðrøðr's undoing came in 1094, when he was driven out of Ireland by the Uí Briain, and died the following year in the Hebrides.
There is uncertainty concerning the political situation in the Isles in the last decade of the eleventh century.
What is known for sure is that, before the end of the century, Magnús Óláfsson, King of Norway (died 1103) led a marauding fleet from Scandinavia into the Isles, seized control of the kingdom, and held power in the Irish Sea region until his death in 1103.
According to the thirteenth–fourteenth-century Chronicle of Mann, when Guðrøðr died in 1095, Lǫgmaðr succeeded him as his eldest son, and went on to reign for seven years.
The numerical calculations and chronology of this source are suspect, and it is uncertain if Lǫgmaðr's reign began before Magnús' arrival, during Magnús' overlordship, or even after Magnús' death.
Despite the uncertainty surrounding the inception of his reign, the chronicle reveals that Lǫgmaðr faced continued opposition from within his own family, in the form of an ongoing rebellion by his brother, Haraldr.

Although the Chronicle of Man maintains that Lǫgmaðr voluntarily vacated his throne, there is reason to suspect that he was forced from power.
In about 1096 the chronicle claims that the leading Islesmen sought assistance of Muirchertach Ua Briain, King of Munster (died 1119), and petitioned him to provide a regent from his own kin to govern the kingdom until Lǫgmaðr's younger brother, Óláfr (died 1153), was old enough to assume control.
The chronicle's account could be evidence that, by about 1096, Lǫgmaðr faced a faction formed around Óláfr; and that, when this bloc was unable to topple Lǫgmaðr by itself, it approached Muirchertach for assistance in placing Óláfr upon the throne.
In any case, the chronicle reveals that Muirchertach then installed Domnall mac Taidc (died 1115) upon the throne.
The slaying of Domnall's brother, Amlaíb, as recorded by the seventeenth-century Annals of the Four Masters in 1096, suggests that Domnall and his immediate family faced significant opposition in the Isles, possibly in the form of Lǫgmaðr's adherents.
The chronicle credits Domnall with an oppressive three-year reign that ended when the leading Islesmen revolted against him, and drove him from the kingdom back to Ireland.
In the 1070s, Guðrøðr Crovan secured the kingship of the Isles through his conquest of Mann, and forcefully added Dublin to his realm in about 1091. Guðrøðr's undoing came in 1094, when he was driven out of Ireland by the Uí Briain, and died the following year in the Hebrides. There is uncertainty concerning the political situation in the Isles in the last decade of the eleventh century. What is known for sure is that, before the end of the century, Magnús Óláfsson, King of Norway (died 1103) led a marauding fleet from Scandinavia into the Isles, seized control of the kingdom, and held power in the Irish Sea region until his death in 1103. According to the thirteenth–fourteenth-century Chronicle of Mann, when Guðrøðr died in 1095, Lǫgmaðr succeeded him as his eldest son, and went on to reign for seven years. The numerical calculations and chronology of this source are suspect, and it is uncertain if Lǫgmaðr's reign began before Magnús' arrival, during Magnús' overlordship, or even after Magnús' death. Despite the uncertainty surrounding the inception of his reign, the chronicle reveals that Lǫgmaðr faced continued opposition from within his own family, in the form of an ongoing rebellion by his brother, Haraldr.
Although the Chronicle of Man maintains that Lǫgmaðr voluntarily vacated his throne, there is reason to suspect that he was forced from power. In about 1096 the chronicle claims that the leading Islesmen sought assistance of Muirchertach Ua Briain, King of Munster (died 1119), and petitioned him to provide a regent from his own kin to govern the kingdom until Lǫgmaðr's younger brother, Óláfr (died 1153), was old enough to assume control. The chronicle's account could be evidence that, by about 1096, Lǫgmaðr faced a faction formed around Óláfr; and that, when this bloc was unable to topple Lǫgmaðr by itself, it approached Muirchertach for assistance in placing Óláfr upon the throne. In any case, the chronicle reveals that Muirchertach then installed Domnall mac Taidc (died 1115) upon the throne. The slaying of Domnall's brother, Amlaíb, as recorded by the seventeenth-century Annals of the Four Masters in 1096, suggests that Domnall and his immediate family faced significant opposition in the Isles, possibly in the form of Lǫgmaðr's adherents. The chronicle credits Domnall with an oppressive three-year reign that ended when the leading Islesmen revolted against him, and drove him from the kingdom back to Ireland.
Assassination of Ingimundr