Question: Who is Eochu Uairches's paternal grandfather?

Knowledge 1: Eochu Uairches
Eochu (or Eochaid) Uairches, son of Lugaid Íardonn, was, according to medieval Irish legend and historical tradition, a High King of Ireland.After Lugaid was overthrown and killed by Sírlám, Eochu was driven into exile overseas, but he returned after twelve years, killed Sírlám with an arrow, and took the throne.His epithet is obscure: the "Lebor Gabála Érenn" says he gained it because of his exile, while Geoffrey Keating explains it as meaning "bare canoes", because he had canoes for a fleet, in which he and his followers used to plunder neighbouring countries.He ruled for twelve years, before he was killed by Eochu Fíadmuine and Conaing Bececlach.The "Lebor Gabála" synchronises his reign with that of Artaxerxes I of Persia (465–424 BC).The chronology of Keating's "Foras Feasa ar Éirinn" dates his reign to 633–621 BC, that of the "Annals of the Four Masters" to 856–844 BC. [SEP] Knowledge 2: Lugaid Íardonn
Lugaid Íardonn, son of Énna Derg, was, according to medieval Irish legend and historical tradition, a High King of Ireland.His epithet, Old Irish for "dark brown", came from the colour of his hair.He succeeded his father, who had died of plague, to the throne, and ruled for nine years before he was killed at Ráth Clochair by Sírlám, son of Finn mac Blatha.The "Lebor Gabála Érenn" synchronises his reign with that of Artaxerxes I of Persia (465–424 BC).The chronology of Geoffrey Keating's "Foras Feasa ar Éirinn" dates his reign to 658–649 BC, that of the "Annals of the Four Masters" to 881–872 BC.
Knowledge 1: Eochu Fíadmuine
Eochu Fíadmuine was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother or half- brother Conaing Bececlach.They took power after killing the previous High King, Eochu Uairches.Eochu ruled the southern half of Ireland, Conaing the north.Their parentage is unclear.The" Lebor Gabála Érenn" reports two possibilities: that he and Conaing were the sons of Congal, son of Lugaid Cal of the Corcu Laigde of County Cork; or that Eochu was the son of Congal, and Conaing was the son of Dui Temrach, son of Muiredach Bolgrach, but both had the same mother, who was also the mother of Eochu Uairches.Geoffrey Keating makes them both sons of Dui Temrach, and the Four Masters make them the sons of Dui's son Congal Coscarach.After five years of joint rule, Eochu was killed by Eochu Uairches' son Lugaid Lámderg.According to the" Lebor Gabála", Conaing remained in power in the north, while Lugaid took the south.The" Annals of the Four Masters" say Lugaid ousted Conaing and took complete control of Ireland.The" Lebor Gabála" synchronises the reign of Eochu and Conaing with that of Artaxerxes I of Persia( 465 – 424 BC).The chronology of Keating's" Foras Feasa ar Éirinn" dates their reign to 621–616 BC, that of the" Annals of the Four Masters" to 844–839 BC. [SEP] Knowledge 2: Conaing Bececlach
Conaing Begeclach was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother or half- brother Eochu Fíadmuine.They took power after killing the previous High King, Eochu Uairches.Conaing ruled the northern half of Ireland, Eochu the south.Their parentage is unclear.The" Lebor Gabála Érenn" reports two possibilities: that he and Eochu were the sons of Congal, son of Lugaid Cal of the Corcu Laigde of County Cork; or that Eochu was the son of Congal, and Conaing was the son of Dui Temrach, son of Muiredach Bolgrach, but both had the same mother, who was also the mother of Eochu Uairches.Geoffrey Keating makes them both sons of Dui Temrach, and the Four Masters make them the sons of Dui's son Congal Coscarach.After five years of joint rule, Eochu was killed by Eochu Uairches' son Lugaid Lámderg.According to the" Lebor Gabála", Conaing remained in power in the north, while Lugaid took the south.The" Annals of the Four Masters" say Lugaid ousted Conaing and took complete control of Ireland.Seven years later, Conaing killed Lugaid and became sole ruler for a further ten( or twenty) years, after which he was killed by Lugaid's son Art.The" Lebor Gabála" synchronises Conaing's career with the reigns of Artaxerxes I( 465 – 424 BC) and Darius II( 423–404) of Persia.The chronology of Keating's" Foras Feasa ar Éirinn" dates his career to 621–599 BC, that of the" Annals of the Four Masters" to 844–812 BC.However, in the saga" Do suidigud tellaich Temrathe settling of the manor of Tara"), the crucifixion of Christ takes place during his reign.
Knowledge 1: Eochu Uairches
Eochu (or Eochaid) Uairches, son of Lugaid Íardonn, was, according to medieval Irish legend and historical tradition, a High King of Ireland.After Lugaid was overthrown and killed by Sírlám, Eochu was driven into exile overseas, but he returned after twelve years, killed Sírlám with an arrow, and took the throne.His epithet is obscure: the "Lebor Gabála Érenn" says he gained it because of his exile, while Geoffrey Keating explains it as meaning "bare canoes", because he had canoes for a fleet, in which he and his followers used to plunder neighbouring countries.He ruled for twelve years, before he was killed by Eochu Fíadmuine and Conaing Bececlach.The "Lebor Gabála" synchronises his reign with that of Artaxerxes I of Persia (465–424 BC).The chronology of Keating's "Foras Feasa ar Éirinn" dates his reign to 633–621 BC, that of the "Annals of the Four Masters" to 856–844 BC. [SEP] Knowledge 2: Conaing Bececlach
Conaing Begeclach was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother or half- brother Eochu Fíadmuine.They took power after killing the previous High King, Eochu Uairches.Conaing ruled the northern half of Ireland, Eochu the south.Their parentage is unclear.The" Lebor Gabála Érenn" reports two possibilities: that he and Eochu were the sons of Congal, son of Lugaid Cal of the Corcu Laigde of County Cork; or that Eochu was the son of Congal, and Conaing was the son of Dui Temrach, son of Muiredach Bolgrach, but both had the same mother, who was also the mother of Eochu Uairches.Geoffrey Keating makes them both sons of Dui Temrach, and the Four Masters make them the sons of Dui's son Congal Coscarach.After five years of joint rule, Eochu was killed by Eochu Uairches' son Lugaid Lámderg.According to the" Lebor Gabála", Conaing remained in power in the north, while Lugaid took the south.The" Annals of the Four Masters" say Lugaid ousted Conaing and took complete control of Ireland.Seven years later, Conaing killed Lugaid and became sole ruler for a further ten( or twenty) years, after which he was killed by Lugaid's son Art.The" Lebor Gabála" synchronises Conaing's career with the reigns of Artaxerxes I( 465 – 424 BC) and Darius II( 423–404) of Persia.The chronology of Keating's" Foras Feasa ar Éirinn" dates his career to 621–599 BC, that of the" Annals of the Four Masters" to 844–812 BC.However, in the saga" Do suidigud tellaich Temrathe settling of the manor of Tara"), the crucifixion of Christ takes place during his reign.

Answer: Énna Derg