'Causantín mac Áeda' (
anglicised 'Constantine II') (before 879 –
952) was king of
Alba from
900 to
943. He was the son of
Áed mac Cináeda and first cousin of the previous ruler,
Domnall mac Causantín. Causantín mac Áeda's reign is the second longest before the
Union of the Crowns in 1603, exceeded only by
William the Lion.
Early Period: the Viking threat

Northern Britain circa 900.
Prior to his reign, Scotland had been dominated by, and perhaps tributary to, the
Viking kings of the Irish Sea province in the later 9th century. During his reign, Causantín faced
Viking raids from the north and west, and expanding
Anglo-Saxon kings of
Wessex, while establishing the kingdom of Alba in its definitive
Gaelicised form.
The Chronicle of the Kings of Alba records an attack by the Vikings, and the plundering of Dunkeld, in the third year of Causantín's reign. The following year, the invaders were defeated in Strathearn.
[1]
The Chronicle of the Kings of Alba records that Causantín and bishop
Cellach
It is supposed that if any single event may be taken to mark the birth of the
kingdom of Alba, then it should be this.
[2]
In 914, the
Annals of Ulster report the defeat of Barid son of Oitir by Ragnall grandson of Ivar in the
Irish Sea. It in is the period of dominance of northern Britain by Ragnall and his cousin Sihtric that Causantín is found as an ally of
Ealdred of
Bernicia and, perhaps, of Queen
Ethelfleda of
Mercia.
[3] Armies led by Ragnall and his brother Sihtric raided throughout northern Britain and Ireland.
[4] They attacked
Chester,
Dumbarton and
Northumbria. The
Uí Ímair - the grandsons of Ivar - were the greatest threat to Alba, hence the alliance with the
Anglo-Saxons of Bernicia and Mercia.
While two
battles of Corbridge are claimed, in 915 and 918, only the second is mentioned by the Chronicle of the Kings of Alba and, at some length, by the Annals of Ulster and the
Fragmentary Annals of Ireland.
[5] The first battle rests on
Symeon of Durham's ''Historia de Sancto Cuthberto''.
[6] The location in Gaelic sources is vague,
Corbridge again coming from Symeon.
[7]
Later period: the English threat
After Corbridge, Ragnall seized control of
York. However, in 920, after taking direct control of Mercia soon after Ethelfleda's death,
Edward the Elder forced Ragnall to acknowledge his rule. While neither of the kings may have been happy with the compromise of 920, neither did they live long enough to break the treaty. Ragnall died in 921, succeeded by his cousin
Sihtric Cáech. Edward died in 924, followed by
Ælfweard, who reigned for a very short time, succeeded by his half-brother
Athelstan. Sihtric may have rebelled in 924, but by 926 he had evidently acknowledged Athelstan as over-king, adopting
Christianity and marrying a sister of Athelstan at
Tamworth. Within the year Sihtric abandoned his new faith and repudiated his unwanted wife. Before Athelstan and he could fight, Sihtric died suddenly in 927.
[8]
Athelstan moved quickly, seizing much of
Northumbria, and securing the submission of Sihtric's brother Gofraid (or Guthfrith), of Ealdred of Bernicia, of Causantín, and of
Owain of Strathclyde. Sihtric's young son
Amlaíb Cuaran (Olaf Sihtricsson) fled to Ireland. In less than a decade, the kingdom of
Wessex had become by far the greatest power in Britain and Ireland, and whatever threat the Vikings, or the early
Uí Ímair, had posed, clearly the main threat to Alba was now to the south.
[9] As if to prove the point, Athelstan imposed his authority on the kings of
Wales,
Hywel Dda and
Idwal Foel among them.
[10]
Brunanburh and after
By the 930s, Causantín, his son-in-law
Amlaíb mac Gofraidh (Olaf Guthfrithsson), the Uí Ímair king of
Dublin, perhaps together with Owain of Strathclyde, are found in alliance,certainly directed against Athelstan. In 933 or 934, Athelstan led "a great army and fleet" into Scotland and laid waste to the country. If this was intended to bring about Causantín's submission, it appears to have failed.
[11]
In 937, the
battle of Brunanburh was a notable victory for Athelstan and his brother
Edmund over Causantín, Amlaíb and Owain. It is commemorated in an
Old English poem.
[12] Owain of Strathclyde is supposed to have died in the battle, as did Cellach son of Causantín.
[13] The report of the deaths of Dubucán son of Indrechtach,
Mormaer of Angus, Eochaid son of Alpín and of Athelstan follow that for Brunanburh, and may be related to the period 937–939.
[14]
For all that Brunanburh was a great victory, it does not appear to have been sufficient to make rule by the West Saxon kings popular in the
Danelaw and
Northumbria. On 27 October, 939, at
Malmesbury, as the Annals of Ulster report: "Athelstan, king of the Saxons, pillar of the dignity of the western world, died an untroubled death."
[15] Before the end of 939, Amlaíb mac Gofraid had seized York without resistance. In 940, he gained control of the Danelaw with little fighting, a treaty being signed with the new West Saxon king, Athelstan's brother Edmund, at the prompting of the Archbishops of Canterbury and York, near
Leicester. The following year, Amlaíb turned north, on Bernicia, campaigning as far as
Tyninghame in East Lothian, but he died that year, being succeeded by his cousin Amlaíb Cuaran.
[16]
Abdication and posterity
The Chronicle of the Kings of Alba states:
The monastery is assumed to have been that of the
Celí Dé at
St Andrews, probably founded in its Céli Dé form during the reign of Causantín.
[17]
The Chronicle is not done with Causantín however. It states that in the seventh year of
Maél Coluim's reign:
Causantín's death is recorded by the Chronicle in 952:
Causantín's son Cellach died at Brunanburh and a daughter married Amlaíb mac Gofraidh. Causantín himself may have had a Norse or
Hiberno-Norse wife as his son
Idulb had a gaelicised Norse name.
[18] The line of kings descended from Causantín appears to have ended with the deaths of his great-grandson
Causantín mac Culéin in 997. Nonetheless, the kingdom which he had created existed in much the same form until the
Scotto-Norman reforming kings
David I, and his grandsons
Máel Coluim IV and
William the Lion, brought about a new form of Scottish kingship in the 12th century.
Notes
1. CKA. Regarding Strathearn, there are two such in Scotland: a southerly area, around Loch Earn, and a northerly one, near Elgin in Fortriu. Arguments can be made for both.
2. Driscoll, ''Alba'', p. 37; Broun, "Dunkeld"; Herbert, ''Ri Éirenn, Ri Alban''.
3. Woolf, "Constantine II"; FA 429, 459.
4. A partial list, for 915–918, includes: AU 915.7, 916.3, 916.6, 917.2, 917.3, 917.4, 918.3, 918.6.
5. CKA; AU 918.4; FA 429.
6. Woolf, "Constantine II" mentions 918 only; Stenton, ''Anglo-Saxon England'', p. 332–333 discusses the battles and the dependence on Symeon.
7. CKA gives ''Tinemore'', as likely to be the East Lothian Tyne as the Northumbrian Tyne; AU and FAI are vague.
8. Higham, ''Kingdom of Northumbria'', pp. 186–190; Stenton, ''Anglo-Saxon England'', pp. 339–340.
9. Woolf, "Constantine II"; Stenton, ''Anglo-Saxon England'', pp. 339–340.
10. Stenton, ''Anglo-Saxon England'', pp. 340–341.
11. Anglo-Saxon Chronicle; Woolf, "Constantine II"; Stenton, ''Anglo-Saxon England'', p. 342.
12. The poem is recorded in the Anglo-Saxon Chronicle; AU 937.6, portrays the battle as being fought between the Norsemen and the Saxons; CKA.
13. CKA; Anglo-Saxon Chronicle.
14. CKA.
15. AU 839.6
16. Stenton, ''Anglo-Saxon England'', pp. 356–358.
17. Woolf, "Constantine II".
18. Walker suggests that the name may represent the Anglo-Saxon Eadwulf, given as Etulbb in the ''Annals of Ulster'', s.a. 913; see Walker, p. 97.
References
Secondary sources
★ John Bannerman, "The Scottish Takeover of Pictland and the relics of Columba" in Dauvit Broun and Thomas Owen Clancy (eds), ''Spes Scotorum: Hope of Scots. Saint Columba, Iona and Scotland.'' T. & T. Clark, Edinburgh, 1999. ISBN 0-567-08682-8
★
Dauvit Broun, "Kenneth mac Alpin" in Michael Lynch (ed.) ''The Oxford Companion to Scottish History.'' Oxford UP, Oxford, 2001. ISBN 0-19-211696-7
★ Dauvit Broun, "Dunkeld and the origins of Scottish Identity" in Dauvit Broun and Thomas Owen Clancy (eds), op. cit.
★
Stephen Driscoll, ''Alba: The Gaelic Kingdom of Scotland AD 800-1124.'' Birlinn, Ednburgh, 2002. ISBN 1-84158-145-3
★
Katherine Forsyth, "Scotland to 1100" in Jenny Wormald (ed.) ''Scotland: A History.'' Oxford UP, Oxford, 2005. ISBN 0-19-820615-1
★
Sally Foster, ''Picts, Gaels and Scots: Early Historic Scotland.'' Batsford, London, 2005. ISBN 0-7134-8874-3
★ Máire Herbert, "''Ri Éirenn, Ri Alban'': kingship and identity in the ninth and tenth centuries" in Simon Taylor (ed.), ''Kings, clerics and chronicles in Scotland 500–1297.'' Fourt Courts Press, Dublin, 2000. ISBN 1-85182-516-9
★ N.J. Higham, ''The Kingdom of Northumbria AD 350-1100''. Sutton, Stroud, 1993. ISBN 0-86299-730-5
★ Kenneth H. Jackson, "The Britons in southern Scotland" in ''Antiquity, vol. 29 (1955)'', pp. 77–88. ISSN 0003598X.
★
Frank Stenton, ''Anglo-Saxon England.'' Oxford UP, Oxford, 1971 (3rd edn). ISBN 0-19-280139-2
★ Ian W. Walker, ''Lords of Alba: The Making of Scotland.'' Sutton, Stroud, 2006. ISBN 0-7509-3492-1
★
Alex Woolf, "Constantine II" in Lynch (ed.), op. cit.
External links and primary sources
★
(AU) Annals of Ulster, part 1, at CELT (
translated)
★
(AI) Annals of Innisfallen, at CELT (
translated)
★
(AT) Annals of Tigernach, at CELT (no translation presently available)
★
(FA) Fragmentary Annals of Ireland, at CELT (
translated)
★
(CKA) The Chronicle of the Kings of Alba
★
The Battle of Brunanburh in Old English and translation
★ The Anglo-Saxon Chronicle
XML Edition by Tony Jebson and
translated at the OMACL
See also
★
Origins of the Kingdom of Alba
★
Scotland in the High Middle Ages