Mac Cairthinn mac Coelboth

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Mac Cairthinn mac Coelboth (?-446?-530?) was an

Background

Mac Cairthinn is one of the very earliest verifiable Irish kings. Though not listed in any extant Irish genealogies, the

The

According to Dáibhí Ó Cróinín the above demonstrates "how far north Leinster's territorial claims once extended" and that warfare between the Laigin and the emerging Uí Néill occurred in the north of Brega and on the plains of what is now County Meath and County Westmeath. All these territories would be lost to the Uí Néill in the following century.

Date of Cath Mag Femen

The date of the battle of Mag Femen is given as 446 in the Annals of Ulster and 447 in the Annals of Inisfallen.

However, Devane (p. 189, 2005) proposes that the date has been misplaced, as a result of "the original source of the entries being wrongly entered by one, if not indeed two, cycles in the Irish 84-year cycle, by the which the Irish and British churches until the sixth century reckoned the date of

References

• Byrne, Francis John, Irish Kings and High-Kings Batsford, London, 1973.
  ISBN 0-7134-5882-8
• Charles-Edwards, T.M., Early Christian Ireland, pp. 453–458.
  ISBN 0-521-36395-0
• Ireland, 400-800, pp. 188, by
  ISBN 0-19-821737-4
  (edited Ó Cróinín).
• Carbury, Co. Kildare - topographical and onomastic hypotheses, Caitriona Devane, in Above and beyond:Essays in memory of
  ISBN 1-869857-86-0
  .