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Diarmait Mac Murchada

After his expulsion from Leinster, he sought support across the sea to recover his kingdom. The arrival of his Anglo-Norman allies in 1169 turned an Irish dynastic struggle into a conquest with lasting consequences.

c. 1110 – 1171KingMac Murchada · ES
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This complete profile is available in English. Bibliographic titles retain their original language. Links marked ES open the Spanish edition.

Historical profile

Key details

Birth: 1110 Approximate

Death: 1171 Documented

Role: King

Other recorded names: Dermot MacMurrough · Diarmait Mac Murchadha

Dynasty: Mac Murchada · ES

Territories: Ireland (ES) · Leinster (ES)

Recorded governments and reigns
King · Leinster · Reign Pending review1126–1166Effective rule
King · Leinster · Reign Pending review1167–1171Effective rule
Family network

Recorded relationships

Children
Documentation

Sources for this profile

Biographical and contextual references in their original language. Sources and methodology.

Evidence for this profile

4 recorded claims · 3 without a claim-specific source. Context references do not by themselves verify every fact.

Dates (1/2 with a precise source)
Governments (0/2 with a precise source)
  • GovernmentPending review

    King · Leinster · 1126–1166

    A precise source has not yet been added.
    No individual review recorded ·
  • GovernmentPending review

    King · Leinster · 1167–1171

    A precise source has not yet been added.
    No individual review recorded ·
Biographical and contextual references (4)
Editorial history
  • 2026-10-12 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-08 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-10-03 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
  • 2026-09-30 · The duchy is limited to Dijon and Autun; each other fief now enters the map only under its dated ruler. John III of Namur and the Nevers/Rethel branch were added. The previous shape combined later counties and unrelated lands as if all belonged to the duchy from 1363.
  • 2026-09-28 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.

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