Constantine III of Scotland

Causantín mac Cuilén (anglicised Constantine III) (before 971–997) was king of Scots from 995 to 997. He was the son of Cuilén mac Iduilb.

Causantín became king of the death of Cináed mac Maíl Coluim, supposedly killed by Finnguala, daughter of Cuncar, Mormaer of Angus. John of Fordun, confusing him with Eógan II of Strathclyde, known as "the Bald", refers to Causantín the Bald. He reigned for eighteen months according to the Chronicle of the Kings of Alba.

The Annals of Tigernach report that he was killed in a battle between the Scots in 997. His death is placed by the Chronicle at Rathinveramond at the mouth of the Almond where it meets the River Tay near Perth. This appears to have been a royal centre, close to Scone and Forteviot, as Domnall mac Ailpín is said to have died there in 862. His killer is named as Cináed mac Maíl Coluim, probably in error for either Cináed mac Duib, who became king on Causantín's death, or perhaps for Máel Coluim mac Cináeda.

Causantín is not known to have any descendants and he was the last of the line of Áed mac Cináeda to have been king.


  • Anderson, Alan Orr, Early Sources of Scottish History A.D 500–1286, volume 1. Reprinted with corrections. Paul Watkins, Stamford, 1990. ISBN 1-871615-03-8
  • Duncan, A.A.M., The Kingship of the Scots 842–1292: Succession and Independence. Edinburgh University Press, Edinburgh, 2002. ISBN 0-7486-1626-8
  • Smyth, Alfred P. Warlords and Holy Men: Scotland AD 80-1000. Reprinted, Edinburgh: Edinburgh UP, 1998. ISBN 0-7486-0100-7
Preceded by:
Cináed mac Maíl Coluim
King of Scots
Succeeded by:
Cináed mac Duib


Monarchs of Scotland (Alba)
Traditional Kings of Picts: (Legendary Kings) | Drest of the 100 Battles | Talorc I | Nechtan I | Drest II | Galan | Drest III | Drest IV | Gartnait I | Cailtram | Talorc II | Drest V | Galam Cennalath | Bruide I | Gartnait II | Nechtan II | Cinioch | Gartnait III | Bruide II | Talorc III | Talorgan I | Gartnait IV | Drest VI | Bruide III | Taran | Bruide IV | Nechtan IV | Drest VII | Alpín I | Óengus I | Bruide V | Cináed II | Alpín II | Talorgan II | Drest VIII | Conall | Caustantín | Óengus II | Drest IX | Eogán | Ferat | Bruide VI | Cináed II | Bruide VII | Drest X
Traditional Kings of Scots: Cináed I | Domnall I | Causantín I | Áed | Eochaid | Giric | Domnall II | Causantín II | Máel Coluim I | Idulb | Dub | Cuilén | Cináed II | Amlaíb | Cináed II | Causantín III | Cináed III | Máel Coluim II | Donnchad I | Mac Bethad | Lulach | Máel Coluim III | Domnall III Bán | Donnchad II | Domnall III Bán | Edgar | Alexander I | David I | Máel Coluim IV | William I | Alexander II | Alexander III | First Interregnum | John | Second Interregnum | Robert I | David II | Edward | David II | Robert II | Robert III | James I | James II | James III | James IV | James V | Mary I | James VI* | Charles I* | The Covenanters | The Protectorate | Charles II* | James VII* | Mary II* | William II* | Anne*
* Also Monarch of Ireland and England

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