Aitíth mac Laigni
King of Ulaid
Aitíth mac Laigni (died 898) (also Aidíth) was a King of Ulaid, which is now Ulster, Ireland. He belonged to a branch of the Dal nAraide known as the Uí Echach Cobo in the west part of county Down. He ruled as King of Ulaid from 896-98.
His last direct ancestor to hold the throne of Ulaid was Fergus mac Áedáin (died 692) of whom he was a 6th generation descendant. He possibly became King of Coba (Cuib) in 882 on the death of Conallán mac Máele Dúin.
He first appears in the annals in 893 when he caused a disturbance at Armagh between the Ulaid and the Cenél nEógain. Some men were killed and the abbot Máel Brigte mac Tornáin had to separate the disputing parties. Compensation had to be paid to the abbot for this. That same year, he slew the King of Ulaid, Bécc mac Airemóin of the Dal Fiatach. He was then responsible for the assassination of Muiredach mac Eochocáin (died 895), another Dal Fiatach King of Ulaid.
Begin with the source’s own compact description: “Aitíth mac Laigni” is king of Ulaid. The dossier treats that line as a proposition to test through Aitíth, Laigni and King, not as a finished interpretation.
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The phrase “king of Ulaid” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Oct 31, 2025. The linked authority identifier is Q4699350. None of the 0 selected statements returned an explicit reference.
Later biographies can compress uncertainty and repeat inherited reputations, so apparently settled claims may still require comparison. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Aitíth mac Laigni” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.