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Diarmait mac Tadg Mor Profile

Privacy Level: Open (White)
Date: About 1098 to about 1159
Location: Irelandmap
Surnames/tags: Ui_Briuin Maicne_Eochaid_Tirmcharna Sil_Cellach, Ui_Maelruanaid Mac_Diarmata
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This profile is part of the Magh Luirg, Ros Comáin One Place Study.

Contents

Biography

Diarmait mac Tadg Mor was the 2nd "ri Magh Luirg" (KIng of Moylurg), and progenitor of Clan Mac Diarmata, died in 1159AD.[1]

The "Annals of the Four Masters" states that he was ...head of the counsel, wisdom, and good supplication of the province of Connaught. [2]

Diarmait was also the king of the Aicidecht, ...sage of the honour and prowess of Conn's Half, whom God blessed, having ended his life at the Rock of Lough Key, [3]

He, along with Muircertach Ua Lachlainn: A hosting by Muircertach Ua Lachlainn along with the nobles of Cenel-Eogain to Ath-Fhirdeadh in aid of the Airghialla. ...to wit, slaughter of Connacht men, around Gilla-Crist, son of Diarmaid, son of Tadhg (Mac Diarmata) and around Muircertach, son of Tadhg (Mac Diarmata) (need reference)

Father

Children

Clann Name:

  • Ui Briuin, Maicne Eochaid Tirmcharna, Sil Cellach, Ui Maelruanaid, Mac Diarmait

Surmised SNP:

  • R1b-BY20594

Research Notes

The 1st Seven Kings of Moylurg

Few annalistic date references can be found for the early Moylurg kings. Based on the dates provided by Dr. Jaski, along with the DNA data from Comparative Analysis of the Descendants and DNA of Conn Cétchathach Ceadcatha[4], a very rough yet logical chronology can be surmised:

  1. Mael Ruanaid Mor, b. 909AD d. 973AD?, aged 64. Unknown length of reign.
  2. Muirchertach mac Mael Ruanaid Mor, b. 936 d. 967, aged 31. Very short reign if indeed he was actually king. He died at The battle of Formaeil, at Rath-beg [5]
  3. Tadg mac Muirchertach, b. 963 d.1040?, aged 77. This method presumes he was 4 years old when his father was killed, which is reasonable. However, according him a 'reign' of 73 years is unlikely. No doubt he was the heir, but it must be assumed someone ruled in his stead until he came of age.
  4. Mael Ruanaid mac Tadg, b. 990 d. 1048? aged 58. Ruled @ 8 years.
  5. Tadhg Mor mac Mael Ruanaid, b. 1044 d. 1124, aged 80. Once again, this method calculates his fathers death when he was 4. His actual reign is recorded to have started in 1120 which leaves a 76 year gap. His brother:
  6. Maelsechlainn mac Tadhg Mor is in the kings list, the Annals of the Four Masters record Maelsechlainn with this terse entry: "Maelseachlainn, son of Tadhg, son of Maelruanaidh, lord of Magh-Luirg, was slain by the men of Breifne and Tighearnan Ua Ruairc." [6]
  7. Diarmait mac Tadhg Mor, b. 1098 d. 1159, aged 61. His reign lasted 35 years. He is the progenitor of the MacDermot family, as well as its offshoot septs such as MacDermot Roe, McDonagh, and Crowley. [7]

See Also

Sources

  1. The Annals of Ulster (Author: [unknown]) https://celt.ucc.ie/published/T100001A/text708.html. U1159.1 Diarmait, son of Tadhg Ua Maelruanaigh, died.
  2. M1159.6 Diarmaid, son of Tadhg Ua Maelruanaidh, lord of Magh-Luirg, head of the counsel, wisdom, and good supplication of the province of Connaught, died. [1]
  3. Annals of Tigernach CELT Project T1159.2 http://research.ucc.ie/celt/document/T100002A]
  4. Comparative Analysis of the Descendants and DNA of Conn Cétchathach Ceadcatha
  5. Annals of the Four Masters, AFM965.11[2]
  6. Maelsechlainn mac Tadhg Mor, From Wikipedia, the free encyclopedia [3]
  7. Dermot mac Tadhg Mor, From Wikipedia, the free encyclopedia [4]
  8. Early Irish Kingship Succession by Jaski, Bart, Published by Four Courts Press, 2013, ISBN 1846824265 ISBN 9781846824265 [5]
  9. Daniel P. McCarthy, Proceedings of the Royal Irish Academy: Archaeology, Culture, History, Literature © 1998 Royal Irish Academy [6]

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