Gofraid mac Fergusa is an alleged ninth-century figure attested by the Annals of the Four Masters and various pedigrees concerning the ancestors of Clann Somhairle and Clann Domhnaill. If the pedigrees are to be believed, he was a son of Fergus mac Eirc, and a descendant of Colla Uais. Likewise, the two annal-entries that note Gofraid mac Fergusa claim that he was an Airgíallan ruler, who aided Cináed mac Ailpín in 835, and died sixteen years later as a ruler of the Isles. Gofraid mac Fergusa's place in the aforesaid pedigrees is chronologically impossible. The events associated with him by the annals are not supported by any contemporary or near contemporary source. In fact, the two annal-entries that recount these alleged events are fabricated additions inserted into the chronicle at some point before the mid seventeenth century.
A number of Irish annals, of which the earliest was the Chronicle of Ireland, were compiled up to and shortly after the end of the 17th century. Annals were originally a means by which monks determined the yearly chronology of feast days. Over time, the obituaries of priests, abbots and bishops were added, along with those of notable political events. Non-Irish models include Bede's Chronica maiora, Marcellinus Comes's Chronicle of Marcellinus and the Liber pontificalis. Most of the Irish annals were written between the 14th and 17th centuries.
Sigtrygg II Silkbeard Olafsson was a Hiberno-Norse king of Dublin of the Uí Ímair dynasty. He was caught up in the abortive Leinster revolt of 999–1000, after which he was forced to submit to the King of Munster, Brian Boru. His family also conducted a double-marriage alliance with Boru, although he later realigned himself with the main leaders of the Leinster revolt of 1012–1014. He has a prominent role in the 12th-century Irish medieval text Cogadh Gaedhil re Gallaibh and the 13th-century Icelandic Njal's Saga, as the main Norse leader at the Battle of Clontarf (1014).
The Battle of Glenn Máma or Glenmama took place most probably near Lyons Hill in Ardclough, County Kildare, Ireland, in AD 999 between Windmill Hill and Blackchurch. It was the decisive and only engagement of the brief Leinster revolt of 999–1000 against the King of Munster, Brian Boru. In it, the combined forces of the Kingdoms of Munster and Meath, under King Brian Boru and the High King of Ireland, Máel Sechnaill II, inflicted a crushing defeat on the allied armies of Leinster and Dublin, led by King Máel Mórda of Leinster.
Cerball mac Dúnlainge was king of Ossory in south-east Ireland. The kingdom of Ossory (Osraige) occupied roughly the area of modern County Kilkenny and western County Laois and lay between the larger provincial kingdoms of Munster and Leinster.
Amlaíb Conung was a Viking leader in Ireland and Scotland in the mid-late ninth century. He was the son of the king of Lochlann, identified in the non-contemporary Fragmentary Annals of Ireland as Gofraid, and brother of Auisle and Ímar, the latter of whom founded the Uí Ímair dynasty, and whose descendants would go on to dominate the Irish Sea region for several centuries. Another Viking leader, Halfdan Ragnarsson, is considered by some scholars to be another brother. The Irish Annals title Amlaíb, Ímar and Auisle "kings of the foreigners". Modern scholars use the title "kings of Dublin" after the Viking settlement which formed the base of their power. The epithet "Conung" is derived from the Old Norse konungr and simply means "king". Some scholars consider Amlaíb to be identical to Olaf the White, a Viking sea-king who features in the Landnámabók and other Icelandic sagas.
Ascall mac Ragnaill meic Torcaill, also known as Ascall Mac Torcaill, was the last Norse-Gaelic king of Dublin. He was a member of the Meic Torcaill, a Dublin family of significance since the early twelfth century.
Gofraid ua Ímair or Guthfrith of Ivar was a Hiberno-Scandinavian and Viking leader who ruled Dublin and briefly Viking Northumbria in the early 10th century. He was a grandson of Ímar and a member of the Uí Ímair. Gofraid was most probably among those Vikings expelled from Dublin in 902, whereafter he helped his kinsman Ragnall conquer Northumbria. Another kinsman, Sitric Cáech, became ruler of Dublin around the same time. Ragnall died in 920, and so the following year Sitric left Dublin to rule in Northumbria, and Gofraid succeeded Sitric as ruler of Dublin. Sitric's early reign was marked by raids he conducted against the Gaelic (Native-Irish), including one at Armagh.
Auisle or Óisle was a Viking leader in Ireland and Scotland in the mid-late ninth century. He was the son of the king of Lochlann, identified in the non-contemporary Fragmentary Annals of Ireland as Gofraid, and brother of Amlaíb Conung and Ímar, the latter of whom founded the Uí Ímair dynasty, and whose descendants would go on to dominate the Irish Sea region for several centuries. Another Viking leader, Halfdan Ragnarsson, is sometimes considered a brother. The Irish Annals title Auisle, Ímar and Amlaíb "kings of the foreigners". Modern scholars use the title "kings of Dublin" after the Viking settlement which formed the base of their power.
Ímar, synonymous with Ivar the Boneless, was a powerful Viking leader in Ireland and Scotland in the mid-late ninth century. He was the progenitor of the Uí Ímair dynasty, who would go on to dominate the Irish Sea region for several centuries. He was the son of the king of Lochlann, identified in the non-contemporary Fragmentary Annals of Ireland as Gofraid. The Fragmentary Annals name Auisle and Amlaíb Conung as his brothers. Another Viking leader, Halfdan Ragnarsson, is considered by some scholars to be another brother. The Irish Annals title Amlaíb, Ímar and Auisle "kings of the foreigners". Modern scholars use the title "Kings of Dublin" after the Viking settlement which formed the base of their power. Some scholars consider Ímar to be identical to Ivar the Boneless, a Viking commander of the Great Heathen Army named in contemporary English sources who also appears in the Icelandic sagas as the eldest son of the legendary Viking Ragnar Lodbrok by third wife Aslaug.
Bruidge mac Nath Í was a king of the Uí Failge, a Laigin people of County Offaly. He was the grandson of Failge Berraide, the eponymous ancestor of the dynasty.
Áed Rón mac Cathail was a king of the Uí Failge, a Laigin people of County Offaly. He was the grandson of Bruidge mac Nath Í, a previous king.
Bárid mac Ímar ; Old Norse: Bárðr or Bárǫðr ; d. 881) was a ninth-century King of Dublin. He was a son of Ivar (Ímar) Ragnarsson and a member of the Uí Ímair.
Domnall Gerrlámhach, also known as Domnall Gerrlámhach Ua Briain, Domnall mac Muirchertaig, and Domnall Ua Briain, was an obscure twelfth-century Uí Briain dynast and King of Dublin. He was one of two sons of Muirchertach Ua Briain, High King of Ireland. Domnall's father appears to have installed him as King of Dublin in the late eleventh- or early twelfth century, which suggests that he was his father's successor-designate. Although Domnall won a remarkable victory in the defence of the Kingdom of Dublin in the face of an invasion from the Kingdom of Leinster in 1115, he failed to achieve the successes of his father. After his final expulsion from Dublin at the hands of Toirdelbach Ua Conchobair, King of Connacht, and the death of his father, Domnall disappears from record until his own death in 1135. He was perhaps survived by two sons.
Énna Mac Murchada, or Enna Mac Murchada, also known as Énna mac Donnchada, and Énna mac Donnchada mic Murchada, was a twelfth-century ruler of Uí Chennselaig, Leinster, and Dublin. Énna was a member of the Meic Murchada, a branch of the Uí Chennselaig dynasty that came to power in Leinster in the person of his paternal great-grandfather. Énna himself gained power following the death of his cousin Diarmait mac Énna. Throughout much of his reign, Énna acknowledged the overlordship of Toirdelbach Ua Conchobair, King of Connacht, although he participated in a failed revolt against the latter in 1124 before making amends. When Énna died in 1126, Toirdelbach successfully took advantage of the resulting power vacuum.
Domnall mac Murchada, also known as Domnall mac Murchada meic Diarmata, was a leading late eleventh-century claimant to the Kingdom of Leinster, and a King of Dublin. As a son of Murchad mac Diarmata, King of Dublin and the Isles, Domnall was a grandson of Diarmait mac Máel na mBó, King of Leinster, and thus a member of the Uí Chennselaig. Domnall was also the first of the Meic Murchada, a branch of the Uí Chennselaig named after his father.
The Battle of Strangford Lough was fought in 877 between two groups of rival Vikings described by the Irish Annals as the "fair heathens" and the "dark heathens". The Annals of Ulster describe "Albann", a figure usually identified with Halfdan Ragnarsson, a leader of the Great Heathen Army, as king of the "dark heathens", and Cogad Gáedel re Gallaib identifies Bárid mac Ímair, King of Dublin as the leader of the "fair heathens". All accounts agree Halfdan was killed in the battle, and Cogad Gáedel re Gallaib adds that Bárid was wounded in it.
Colla mac Báirid or Colla ua Báirid was a Viking leader who ruled Limerick in the early 10th century. He first appears in contemporary annals in 924 when he is recorded as leading a raiding fleet to Lough Ree. He appears in the annals for the second and final time in 932 when his death his recorded. In both of these instances he is titled king of Limerick. Colla's parentage is uncertain; according to one theory he was the son or grandson of Bárid mac Ímair, a Uí Ímair king of Dublin, and according to another he was the son of Bárid mac Oitir.
Gebeachan, also known as Gébennach, and Gebechán, was a tenth-century King of the Isles. He seems to have been a subordinate to Amlaíb mac Gofraid, King of Dublin, and is recorded to have fought and died at the Battle of Brunanburh in 937.
Tomrair was a ninth-century Viking active in Ireland. He is one of the first Vikings recorded by Irish sources. Tomrair is reported to have been killed at the Battle of Sciath Nechtain, a conflict in which twelve hundred Vikings were slain, battling the combined forces of Ólchobar mac Cináeda, King of Munster and Lorcán mac Cellaig, King of Leinster, in 848.
