Diarmait mac Donnchad, tanist of Osraighe

ii) DONNCHAD (-[974/76]). The Annals of Inisfallen record that "Donnchadh son of Cellach took the kingship of Osraige” in 934[714]. King of Ossory. The Annals of the Four Masters record that “Donnchadh son of Ceallach lord of Osraighe” killed “Braen son of Maelmordha king of Leinster” in 945[715]. The Annals of Tigernach record the death of “Donnchad, son of Cellach king of Ossory in senili étate” in [974/75][716]. The Annals of the Four Masters record the death in 974 of “Donnchadh son of Ceallach lord of Osraighe”[717]. The Annals of Inisfallen record the death in 976 of "Donnchadh son of Cellach king of Osraige”[718]. The Annals of Ulster record the death in 976 of "Donnchadh, son of Cellach, king of Osraige”[719]. m ---. The name of Donnchad´s wife is not known. Donnchad & his wife had five children:

(a) GILLA PATRAIC (-996).
(b) DIARMAIT (-killed 972). The Annals of the Four Masters record that “Diarmaid son of Donnchad, Tanist of Osraighe” was killed in 972 in “a slaughter of the Osraighi in Iarthar-Liphi”[721]. The Annals of Ulster record the death in 974 of "Diarmait son of Donnchad” killed by “Ugaire son of Tuathal”[722]. m ---. The name of Diarmait´s wife is not known. Diarmait & his wife had one child:

(1) CELLACH (-killed [1001/02]). The Annals of Inisfallen record the death in 996 of "Gilla Pátraic son of Donnchadh king of Osraige” and the accession of “Cellach son of Diarmait”[723]. King of Ossory. The Annals of Tigernach record that “Cellach son of Diarmait king of Ossory” was killed in [1001/02] by “the son of his father´s brother…Donchad son of Gilla Patraic”[724].

(c) MUIRDACH (-973). The Annals of the Four Masters record the death in 973 of “Muireadhach son of Donnchadh son of Ceallach, Tanist of Osraighe”[725].
(d) TADG (-killed [990/91]). The Annals of the Four Masters record the death in 990 of “Tadhg son of Donnchadh, Tanist of Osraighe”[726]. The Annals of Ulster record the death in 991 of “Tadc son of Donnchad, heir designate of Osraige”[727].
(e) MOR (-[984/85]). The Annals of Tigernach record the death in [984/85] of “Mor, daughter of Dondchad son of Cellach, and queen of Ireland”[728]. This passage does not name Mor´s husband. However, Maelsechnaill is the only person described in other passages in the Annals as king of Ireland at that time. m as his first wife, MAELSECHNAILL King of Ireland, son of DOMNALL & his wife --- ([949/50]-Cró Inis of Lough Ennell 2 Sep 1022).

• Charles Cawley's Medieval Lands: IRELAND