Question: Who is the paternal grandfather of Ollom Fotla?

Knowledge 1: Ollom Fotla
Ollom Fotla ("the scholar of Fódla", a poetic term for Ireland; later spelled Ollamh Fodhla), son of Fíachu Fínscothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland.His given name was Eochaid.He took power after killing his predecessor, Faildergdóit, whose father, Muinemón, had killed his father.He ruled for forty years, and died of natural causes at Tara, succeeded by an unbroken sequence of six descendants, beginning with his son Fínnachta, followed by two more sons, Slánoll and Géde Ollgothach.He is said to have instituted the "Feis Temrach" or Assembly of Tara.Keating describes the "Feis Temrach" as an assembly like a parliament, at which the nobles, scholars and military commanders of Ireland gathered on Samhain every three years to pass and renew laws and approve annals and records.The Assembly was preceded and followed by three days of feasting.He also built a structure at Tara called the "Múr nOlloman" or Scholar's Rampart.It has been identified without any convincing reason that the Passage Tomb of Ollamh Fodhla is Cairn T in Loughcrew.There's also a large stone with neolithic carvings on it at the site, known as Hags chair or the seat of Ollamh Fodhla.It is believed Cairn T was also where the great 'Law-giver king', first promulgated his legal code. [SEP] Knowledge 2: Fíachu Fínscothach
Fíacha Fínscothach, son of Sétna Airt, was, according to medieval Irish legend and historical tradition, a High King of Ireland.His father became High King after killing the previous incumbent, Rothechtaid mac Main, in single combat at Cruachan in defence of Fíachu.Fíachu went into exile, but returned at the head of a "black fleet", and, with the assistance of Muinemón, killed his father and took the throne himself. "Flowers of wine" (Old Irish: "fínwinescothflower-ach", possessive suffix, although "scoth" can also mean "blade" and "voice"), which were pressed into glass vats, were said to exist during his reign.He ruled for twenty years, until he was killed by his former accomplice, Muinemón.The chronology of Geoffrey Keating's "Foras Feasa ar Éirinn" dates his reign to 975–955 BC, that of the "Annals of the Four Masters" to 1353–1333 BC.
Knowledge 1: Ollom Fotla
Ollom Fotla ("the scholar of Fódla", a poetic term for Ireland; later spelled Ollamh Fodhla), son of Fíachu Fínscothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland.His given name was Eochaid.He took power after killing his predecessor, Faildergdóit, whose father, Muinemón, had killed his father.He ruled for forty years, and died of natural causes at Tara, succeeded by an unbroken sequence of six descendants, beginning with his son Fínnachta, followed by two more sons, Slánoll and Géde Ollgothach.He is said to have instituted the "Feis Temrach" or Assembly of Tara.Keating describes the "Feis Temrach" as an assembly like a parliament, at which the nobles, scholars and military commanders of Ireland gathered on Samhain every three years to pass and renew laws and approve annals and records.The Assembly was preceded and followed by three days of feasting.He also built a structure at Tara called the "Múr nOlloman" or Scholar's Rampart.It has been identified without any convincing reason that the Passage Tomb of Ollamh Fodhla is Cairn T in Loughcrew.There's also a large stone with neolithic carvings on it at the site, known as Hags chair or the seat of Ollamh Fodhla.It is believed Cairn T was also where the great 'Law-giver king', first promulgated his legal code. [SEP] Knowledge 2: Fínnachta
Fínnachta, son of Ollom Fotla, was, according to medieval Irish legend and historical tradition, a High King of Ireland in succession to his father.His given name was Elim.There is said to have been snow of wine( Old Irish" fínwinesnechtasnow") in his reign, from which he gained his better- known name.He ruled for twenty years before dying of plague at Mag Inis in Ulster, and was succeeded by his brother Slánoll.The chronology of Geoffrey Keating's" Foras Feasa ar Éirinn" dates his reign to 913–895 BC, that of the" Annals of the Four Masters" to 1278 – 1258 BC.
Knowledge 1: Ollom Fotla
Ollom Fotla ("the scholar of Fódla", a poetic term for Ireland; later spelled Ollamh Fodhla), son of Fíachu Fínscothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland.His given name was Eochaid.He took power after killing his predecessor, Faildergdóit, whose father, Muinemón, had killed his father.He ruled for forty years, and died of natural causes at Tara, succeeded by an unbroken sequence of six descendants, beginning with his son Fínnachta, followed by two more sons, Slánoll and Géde Ollgothach.He is said to have instituted the "Feis Temrach" or Assembly of Tara.Keating describes the "Feis Temrach" as an assembly like a parliament, at which the nobles, scholars and military commanders of Ireland gathered on Samhain every three years to pass and renew laws and approve annals and records.The Assembly was preceded and followed by three days of feasting.He also built a structure at Tara called the "Múr nOlloman" or Scholar's Rampart.It has been identified without any convincing reason that the Passage Tomb of Ollamh Fodhla is Cairn T in Loughcrew.There's also a large stone with neolithic carvings on it at the site, known as Hags chair or the seat of Ollamh Fodhla.It is believed Cairn T was also where the great 'Law-giver king', first promulgated his legal code. [SEP] Knowledge 2: Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.He was the grandfather of Emperor Yōzei.

Answer: Sétna Airt