The Four Masters. The Annals of the Kingdom of Ireland. Trans. John O'Donovan. Dublin: Hodges and Smith, 1851. (Compiled 1632-1636 A.D.) Online version: Annals of the Four Masters

O'Ferrall, Roger. Linea Antiqua Trans. Sir William Betham. 1709

O'Hart, John. Irish Pedigrees. 1876.

O'Clery, Cucogry. O'Cleary's Book of Genealogies. 1642.

Clan McLaughlin Society
Who used in addition to above genealogical sources:
Rawlinson B.502 (c.1120)
Leabhar Leacdin (Book of Lecan) (c. 1390)
Leabhar Bahile an Mhota (Book of Ballymote) (c.1390)
Annals of Tighernach
Annals of Ulster
Annals of Clonmacnoise
Annals of Inish Faighlinn
Leabhar Laighean (Book of Leinster) (c. 1170)

Mullin, Rev. T. H. and Mullin, Rev. J. E.The Ulster Clans.Limavady, County Derry, Northern Ireland:North-West Books, 1966.

Mclaughlin Family History

The MacLochlainns of Inishowen - A Genealogical History

O'Ceallaigh, Seamus. Gleanings from Ulster History. Dublin:Ballinascreen Historical Society, 1952.

Brown, John Patrick Brown A.B. The MacLaughlins of Clan Owen. Boston:W.J. Schofield, 1879.

The MacLaughlins of Clan Owen

Ireland's History in Maps

The Decent of the O'Neill Mor

Irish Kings

Cahill, Thomas. How the Irish Saved Civilization. New York:Nan A. Talese/Doubleday, 1995.

McCullcugh, David Willis. Wars of the Irish Kings. New York:Crown Publishers, 2000.

Clan MacLachlan Society - Western USA

Clan MacNeil

Descent Line of the MacLachlan Chiefs

Niall of the Nine Hostages

Famous Irish - Niall of the Nine Hostages

Royal O'Neill Clan

Royal Genealogical Database Search Results:High kings of Ireland|Tara

Royal Genealogical Database Search Results:Kings of Aileach