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Donnchadh Donn mac Flainn (older spelling: Donnchad Donn mac Flainn) (''Duncan of the Brown Hair, son of Flann'') (died 944) was High King of Ireland and King of Mide. He belonged to Clann Cholmáin, a branch of the southern Uí Néill. ==Origins== Donnchad was the son of High King Flann Sinna by his wife Gormlaith ingen Fhlainn maic Conaing.〔Doherty.〕 The date of his birth is not known, but he was apparently an adult in 904 when he is found as the leader, or figurehead, of a challenge to his father at Kells. The ''Annals of Ulster'' state that many of Donnchad's associates were beheaded by Flann, and that the High King profaned the sanctuary at Kells to seize Donnchad.〔Annals of Ulster, s.a. 904.〕 Donnchad again rebelled against his father in 915, with the support of his brother Conchobar, but this rebellion was suppressed by his sister's Gormlaith's husband, and his father's heir, Niall Glúndub. When Flann died in 916, Niall Glúndub succeeded him as King of Tara, while Conchobar became King of Mide, the kingship of Clann Cholmáin. Niall and Conchobar were both killed on 14 September 919, in battle against the Foreigners—Vikings and Norse-Gaels—at Dublin. Other Irish kings and princes among the dead were another of Donnchad's sister's husbands, Máel Mithig mac Flannacáin, Niall Glúndub's brother's son and heir-designate Flaithbertach mac Domnaill, "and many other nobles".〔Annals of Ulster, s.a. 919.〕 Donnchad succeeded to the kingship of Mide, and to the high kingship of Ireland. He immediately had his brother Áed blinded.〔 Two years later, Donnchad disposed of another brother, the annals saying: "Domnall grandson of Máel Sechnaill was deceitfully killed by his brother Donnchad, which was fitting."〔Annals of Ulster, s.a. 921.〕 Some years later, Donnchad disposed of his nephew, Máel Ruanaid, Conchobar's son.〔Annals of Ulster, s.a. 928.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Donnchad Donn」の詳細全文を読む スポンサード リンク
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