Family Tree
  • Episodes
    Episode Index Key Dates Timelines By Category This day in history
    Episodes
    Saxons, Angles and Jutes Viking Invasions The Norman Invasion The Hundred Years War War of the Roses Complete list of Episodes
    Timelines
    Timeline Index 1001 .. 1100 1101 .. 1200 1201 .. 1300 1301 .. 1400 1401 .. 1500 1501 .. 1600
    Key Dates
    1001 - 1200 1201 - 1300 1301 - 1400 1401 - 1500 1501 - 1600
    More
    This day in history Timelines by Category
  • People
    Medieval People A..Z English Kings & Queens Kings of Scotland Kings of France Kings of Denmark Emperors of Byzantine Popes and Antipopes Crusader States and their Rulers Family Trees
    Rulers
    Medieval People A..Z English Kings & Queens Kings of Scotland Kings of France Kings of Denmark Emperors of Byzantine Listed by Century Births and Deaths Family Trees
    More
    Medieval Knights Popes and Antipopes Crusader State Rulers
    Heraldry
    Medieval Heraldry Heraldry Colours Heraldry Divisons Heraldry Ordinaries Heraldry Crosses Common Charges Heraldry Beasts
    Shield Designer
    Design your Shield
  • Life
    Life in Medieval Times Life in a Castle The Feudal System Country Life and Agriculture Life in a Medieval Town Life in a Religious Community
    General
    Life in Medieval Times The Feudal System The Black Death The Peasants Revolt
    Life in
    Life in a Castle Life in a Village Life in a Town
    Life as
    Life as a Medieval Knight
    The Abbey
    Life in an Abbey The Medieval Abbey The Origin of Monasteries Religious Orders
  • Castles
    Castle Index Page Castle Development Early Fortifications Motte and bailey Castles Square Keeps Castle of William the Conqueror Concentric Castles Castles of Edward I Castle Siege Tactics Parts of a Castle Locations of over 300 Castles UK Castles by County
    General
    Castle Index Page Castle Development Purpose of a Castle Life in a Castle
    Types
    Early Fortifications Motte and Bailey Square Keeps Conquest Castles Concentric Castles Castles of Edward I
    More
    Castle Siege Tactics Parts of a Castle Master Masons
    Locations
    300 Castles UK Castles by County
  • Places
    A..Z list of Medieval Buildings Maps Photographs Abbeys and Monasteries Cathedrals Medieval Architecture
    Places
    Medieval Buildings A..Z Photographs
    Maps
    Index Page
    Abbeys
    Abbeys and Monasteries Layout of a Medieval Abbey Cathedrals Medieval Architecture
     
  • 3D/VR
    Virtual Reconstructions
    Virtual Motte and Bailey Castle Virtual Norman Keep Virtual Siege Engines
    Virtual Bodiam Castle Virtual Skenfrith Castle Virtual Middleham Castle Virtual White Tower Virtual Etal Castle
    Knights Training
    3D Reconstructions
    Index Page Motte and Bailey Castle Bodiam Castle Skenfrith Castle Middleham Castle The White Tower
    3D Locations
    The Medieval Abbey The Medieval Town The Medieval Village
    2D
    The Medieval Town The Manor House
    Headset VR
    VR Experiences VR Medieval Keep VR Medieval House
  • More
    • Test your Knowledge

    • Glossary of Terms
    • Glossary of Heraldic Terms
    • Scriptorium

    • Games
    • Early Access

    • Copyright / About TimeRef.com
    • Contact the Author
  • Episodes
    Episodes
    Saxons, Angles and Jutes Viking Invasions The Norman Invasion The Hundred Years War War of the Roses Complete list of Episodes
    Timelines
    Timeline Index 1001 .. 1100 1101 .. 1200 1201 .. 1300 1301 .. 1400 1401 .. 1500 1501 .. 1600
    Key Dates
    1001 - 1200 1201 - 1300 1301 - 1400 1401 - 1500 1501 - 1600
    More
    This day in history Timelines by Category
  • People
    Rulers
    Medieval People A..Z English Kings & Queens Kings of Scotland Kings of France Kings of Denmark Emperors of Byzantine Listed by Century Births and Deaths Family Trees
    More
    Medieval Knights Popes and Antipopes Crusader State Rulers
    Heraldry
    Medieval Heraldry Heraldry Colours Heraldry Divisons Heraldry Ordinaries Heraldry Crosses Common Charges Heraldry Beasts
    Shield Designer
    Design your Shield
  • Life
    General
    Life in Medieval Times The Feudal System The Black Death The Peasants Revolt
    Life in
    Life in a Castle Life in a Village Life in a Town
    Life as
    Life as a Medieval Knight
    The Abbey
    Life in an Abbey The Medieval Abbey The Origin of Monasteries Religious Orders
  • Castles
    General
    Castle Index Page Castle Development Purpose of a Castle Life in a Castle
    Types
    Early Fortifications Motte and Bailey Square Keeps Conquest Castles Concentric Castles Castles of Edward I
    More
    Castle Siege Tactics Parts of a Castle Master Masons
    Locations
    300 Castles UK Castles by County
  • Places
    A..Z list of Medieval Buildings Maps Photographs Abbeys and Monasteries Cathedrals Medieval Architecture
    Places
    Medieval Buildings A..Z Photographs
    Maps
    Index Page
    Abbeys
    Abbeys and Monasteries Layout of a Medieval Abbey Cathedrals Medieval Architecture
     
  • 3D/VR
    3D Reconstructions
    Index Page Motte and Bailey Castle Bodiam Castle Skenfrith Castle Middleham Castle The White Tower
    3D Locations
    The Medieval Abbey The Medieval Town The Medieval Village
    2D
    The Medieval Town The Manor House
    Headset VR
    VR Experiences VR Medieval Keep VR Medieval House
  • More
    • Test your Knowledge

    • Glossary of Terms
    • Glossary of Heraldic Terms
    • Scriptorium

    • Games
    • Early Access

    • Copyright / About TimeRef.com
    • Contact the Author
Biography
Biography
Please note that the TimeRef website is currently being redesigned.

Murchadha, Diarmait mac (King of Leinster)

Tweet
 Born   Born At
 Died  Buried At
 Born / 
 Died / 
Or Dermot. Dermot was the King of Leinster, an area of eastern Ireland. He was in conflict with Tighernan O Ruairc, another ruler in the region. In 1166 Dermot was defeated by Tighernan and exiled to England. Dermot needed help if he was to retake his homeland and so he approached Henry II. Henry did not want to get directly involved but allowed Dermot to raise an army from the Welsh and English people he could find to help him. The most important person Dermot found to help him was Richard de Clare 'Strongbow', the Earl of Pembroke. Strongbow agreed to help in return for Dermot's daughter's hand in marriage and to rule Leinster after Dermot's death. The medieval historian Gerald of Wales described Dermot as 'He was tall of stature and stout of build. A man of warlike spirit and a brave one in his nation, with a voice hoarse from shouting in battle. One who preferred to be feared rather than to be loved, who put down the nobles and raised up the lowly, who was a tyrant to his own people and hated by strangers. His hand was against every man and every man's hand was against his'.

Related Episodes

Conquest of Ireland (click here)

Conquest of Ireland (click here)

 

Family Tree Details

 Murchadha, Diarmait mac (King of Leinster)
 Murchadha, Diarmait mac (King of Leinster)

See Also

    People

    • Clare, Richard fitzGilbert de (Strongbow, Earl of Pembroke)
    • Henry (II, King of England 1154-1189)
    • A .. Z List of Medieval People

    Timeline

    1166
    ...
    Dermot exiled from Ireland

    Dermot, the King of Leinster in eastern Ireland, was defeated in battle by Tighernan O Ruairc, another ruler in the region. Dermot was exiled and went to Normandy and the court of King Henry II of England to ask for assistance in retaking his lands. Henry gave Dermot permission to find a willing army from either England or Wales and so Dermot approached Richard de Clare, the Earl of Pembroke who agreed to help in return for several demands. These demands were Dermot's daughter's hand in marriage and to rule Leinster after Dermot died. [1]

    1167
    Aug
    Dermot returns to Ireland

    Dermot returned to Ireland but without an army. He was unable to retake Leinster and had to wait until the forces he had been promised arrived from Wales. [1]

    1169
    May
    Dermot retakes Leinster

    Some the men promised to assist Dermot in Ireland landed at Bannow with the sons of Nesta. The poorly protected Irish warriors were no match for the armoured knights and archers that arrived from Wales. By the end of the year Leinster fell and Dermot once again became the King. After his victory Dermot was not satisfied with just ruling Leinster but wanted to become High King of Ireland. To fulfil his ambitions he had to wait for the arrival of Strongbow, the Earl of Pembroke, for that to be a possibility. [1]

    1170
    May
    Raymond de Gros lands in Ireland

    Raymond de Gros arrived in Ireland in support of Dermot a few months ahead of Strongbow. He landed at Waterford and constructed a fort in which he and his men prepared for the arrival of the Earl.

    Aug
    Ireland attacked by Earl of Pembroke

    Richard de Clare, the Earl of Pembroke, invaded Ireland with 200 knights in armour and up to a 1,000 foot-soldiers capturing Waterford easily and then Dublin on behalf of Dermot, the King of Leinster.

    1171
    Spring
    Death of Dermot, King of Leinster

    The agreement between the Earl of Pembroke and Dermot, the King of Leinster, was that if the Earl helped the King retake Leinster the Earl would become the ruler of Leinster when Dermot died. When the king died in the spring of 1171 the agreement fell apart due to the lack of support from Dermot's tribesmen. The tribesmen elected a nephew of Dermot's as the new king instead. [1]

    On this day in history:

    3D Virtual Reconstructions

    Transport yourself back up to a thousand years and explore historical buildings as they may have appeared in the past. Built using the popular game development tool Unity 3D, these reconstructions will run in the most of the popular web browsers on your desktop or laptop computer.

    More medieval people

    Uncover the lives of the hundreds of kings, queens, lords, ladies, barons, earls, archbishops and rebels who made the medieval people an exciting period of history to live through.

    Page Navigation

    Selection of references used:

    • 1: H.W.C.Davis, England under the Normans and Angevins, 1949

      See Also

        People

        • Clare, Richard fitzGilbert de (Strongbow, Earl of Pembroke)
        • Henry (II, King of England 1154-1189)
        • A .. Z List of Medieval People

        Medieval Heraldry

        Learn about medieval shield design.

        Design your own medieval Coat of Arms.

        Explore the White Tower

        Explore four floors of the keep at the Tower of London.

         

        Adventure Game - Early Access

        Early Access to the TimeRef card-based Adventure Game.

         

        Medieval Town - Early Access

        Explore the medieval town.

         

        Medieval Village - Early Access

        Explore the medieval village.

         

        Medieval Abbey - Early Access

        Explore the medieval abbey.

         

        Medieval Theatre - Early Access

        Explore the medieval theatre.

         

        ^ Back to top

                This popup will contain more information
                This popup will contain more information
                xyz
                xyz