Éogan Mór
In Irish traditional history Eógan, eldest son of Ailill Ollamh, was a 2nd or 3rd century AD king of Munster. He ruled for either fifteen or seventeen years, though fifteen is the number most often given. Wikipedia
Grandparents: Conn of the Hundred Battles and Mug Nuadat
Parents: Ailill Aulom and Sadb ingen Chuinn
Grandchildren: Ailill Flann Bec and Ailill Flann Mór
Descendants: Fiachu Muillethan, Ailill Flann Bec, Dáire Cerbba, and more
Great grandchild: Dáire Cerbba