Date: About 0963 to about 1040
Location: Ireland
Surnames/tags: Ui_Briuin Sil_Cellach Ui_Maelruanaid

Contents 1 Biography 1.1 Father 1.2 Children 1.3 Clann Name: 1.4 Surmised SNP: 2 Research Notes 2.1 The 1st Seven Kings of Moylurg 2.2 See Also 3 Sources 3.1 WikiTree:

Biography

Tadhg mac Muirchertach was one of the early kings of Moylurg, and the most obscure. Even the years of his reign are unknown. All that can be said with certainty is that he lived in the middle decades of the eleventh century and his father was Muirchertach mac Maelruanaidh Mor. He was succeeded by his son, Maelruanaidh mac Tadhg, in or around the year 1080, though this too is an educated guess. ^[1]

Father

• Muirchertach mac Mael Ruanaid Mor Profile
  • (NOTE: LNAB is 'mac' fathers first name).

Children

• Mael Ruanaid mac Tadg Profile

Clann Name:

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

Surmised SNP:

• R1b-FT219063

Research Notes

Dr. Jaski notes his death at 1040(?) which is more in line chronologically. The date of 1080AD is highly unlikely. Since his father Muirchertach mac Mael Ruanaid died in 967AD, his reign would have ended 113 years after his fathers death.

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^[2], 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 ^[3]
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." ^[4]
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. ^[5]

See Also

• Names and dates (when provided) are from Bart Jaski's Chart #60 ^[6] and "The Chronology of the Irish Annals" ^[7]
• Any unsourced DOB and DOD are based on Michael Rowley's Comparative Analysis of the Descendants and DNA of Conn Cétchathach Ceadcatha; are designated by 'SP'; and are purely speculative based on DNA data as of May, 2022.
• SNP data is also purely speculative using the same spreadsheet.

Sources

1. ↑ Tadhg mac Muirchertach, From Wikipedia, the free encyclopedia [1]
2. ↑ Comparative Analysis of the Descendants and DNA of Conn Cétchathach Ceadcatha
3. ↑ Annals of the Four Masters, AFM965.11[2]
4. ↑ Maelsechlainn mac Tadhg Mor, From Wikipedia, the free encyclopedia [3]
5. ↑ Dermot mac Tadhg Mor, From Wikipedia, the free encyclopedia [4]
6. ↑ Early Irish Kingship Succession by Jaski, Bart, Published by Four Courts Press, 2013, ISBN 1846824265 ISBN 9781846824265 [5]
7. ↑ Daniel P. McCarthy, Proceedings of the Royal Irish Academy: Archaeology, Culture, History, Literature © 1998 Royal Irish Academy [6]

WikiTree:

• Historical Sources of Ireland
• Medieval Project - Ireland
• Kings of Magh Luirg
• Comparative Analysis of the Descendants and DNA of Conn Cétchathach Ceadcatha
• Descent of Mael Ruanaid Mor