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Seoan mac Maoilsheachlainn

Seoan mac Maoilsheachlainn, anglicised John MacMahon, was king of Airgíalla, or Oriel, the Gaelic kingdom centred on Armagh and Monaghan. A son of Maoilsheachlainn, he ruled from 1331 to 1342.

References

  1. en.wikipedia.org/wiki/McMahon_clans
  2. en.wikipedia.org/wiki/Airgíalla