The McLaughlin Surname

   The personal name "Lochlan" or its variant in Irish, "Lachlan," forms the basis for the surname MacLochlainn (genitive form), meaning "son of Lochlan," commonly anglicised to MacLaughlin or MacLoughlin; or from "Mag," the variant form of "Mac," to MacGlaghlin, MacGloghlin, etc. In Scotland the name most often takes the form "Maclachlan," but is routinely anglicised to McLaughlin in other countries. Contrary to popular belief the form "Mac" was never limited to Scottish usage but was the original Irish form, abbreviated to "Mc" or "M'" by English scribes.

   The forms "McLaughlin" and "McLoughlin" are simply variants, based on the Irish variants of "Lochlan" and "Lachlan." The "au" form is today much more common, particularly in the north of Ireland, but the "ou" form may be found there as well. The "ou" form is more common in Connacht, Leinster, near Dublin and in the south of Ireland.

   The McLaughlins of Donegal based their surname on an ancestor named Lochlan, who lived about 1020 A.D. His grandson was Domnall MacLochlainn, the High King of Ireland, who died in 1121 A.D. This Domnall MacLochlainn is referred to in the "Annals of Ireland" as both "Domnall Ua Lochlan" and "Domnall Ua Neill," indicating he may have been the first of this line to assume the surname MacLochlainn. There is some supposition that Lochlan may have been the son of a Viking princess, although there is no support for this theory in the Annals of Ireland.

   Many interpretations have been advanced for the surname MacLochlainn, which is commonly said to have been of Norse origin, including "men of the fiord-land or lakes, strong at sea and sons of the sea." But these interpretations are based on the Irish root "Loch" meaning lough or lake and are clearly of Irish origin. In the ancient annals of Ireland, however, the homeland of the Norse invaders of the 9th and 10th centuries was invariably referred to by the annalists as "Lochlan," often found in the text as "Tir na Lochlannaigh" or the "land of the Norsemen."

   Norse scholars influenced by the work of Marstrander believe the name "Lochlan" was a corruption of the Norse "Rogaland," a region of Norway from which many of the first Norse invaders of the western isles emigrated. According to Marstrander, on an Irish tongue "Rogaland" would become Rochlann which would later become "Lochlann" under the influence of the second "L" and a folk-entymological association with Loch (Gaelic for lake). Irish experts (Woulfe and MacLysaght) indicate "Lochlan" was a Norse personal name, but there is no support for this thesis in traditional Norse genealogies and if the name did originate as a personal name amoung the Norse it did so in Ireland. Many have suggested that the name "Lochlan" therefor indicates intermarriage with the Norse and this may well have been the case, particularly in those families which were amoung the first to adopt the name.

Donnchadh O Corrain, Department of History, University College, Cork,  has written a long article on the derivation of the Norse place-name "Lochlan."  (THE VIKINGS IN SCOTLAND AND IRELAND IN THE NINTH CENTURY).  O Corrain believes that Lochlan originally referred to Viking Scotland, which included the Isle of Mann, and only later became the Irish word for Norway.


Incidences of the MacLaughlin surname
appearing throughout Ireland in 17th
century documents.



1. Co. Donegal 1659 Census

Inishowen Barony

McLaughlin 63
McGlaghlin 76


Barony of Boylagh and Bonagh

McGlaghlin 14


2. Londonderry Co.

Londonderry City and County

McLaughlin 04


Terkerin Barony

McLaughlin 19


Kenaght Barony

McLaughlin 30


3. Tyrone County Hearth Money Rolls 1665

Omagh Barony

Longfield Parish

Philip McLaughlin of Sopgaly
Edmond " "


Drumra Parish

Donold oge McLaughlin of Cullbuke


4. Antrim County 1659 Census

Baronys of Dunluce Carey and Kilconway

McGloughlen 13


State Papers 1663

"The whole barony of Cary was by proviso set out
for the payment of part of the Marquis of Antrim's
debt, but was set out to .... "

List of names includes: George McLaughlin


5. Westmeath County 1659 Census

Barony of Clonlonan

McLaughlin 10


Barony of Moygoishe

Loughlin 07


6. Kings County 1659 Census

Barony of Garriecastle

titulado: Terence Melaghline, gent.
townland: Gallen


Barony of Phillipstowne

titulado: Richard Loughlin, Esq.
townland: Clontrell


7. Leitrim County 1659 Census

Barony of Drumaheir and Rosclogeer

McLoghlen 32


8. Roscommon County 1659 Census

Barony of Boyle

McLaghlin 08


Barony of Moycarnan

MacLoughlin 05



Barony of Ballentabber

O'Melaghlin 11

titulado: Neile O'Melaghlin, gent.
townland: Cloonbellagh


9. Sligo County 1659 Census

Barony of Tyreragh

McGillaghlen 03
Loghlin 06


Barony of Tyrerell

McLoghln 15


Barony of Culavin and Tiregh

McGillaghlen 06
Loghlin 06


10. Wexford County 1659 Census

Barony of Shelbyrne

Loughnan 08


11. Kilkenny County 1659 Census

Barony of Gawran

McLoghlin 11
Loghman 06


12. Limerick County 1659 Census

Barony of Owny

McLoghlen 05


Persons transplanted in Ireland
1653-54
O'Hart "Landed Gentry"


City and County of Limerick

McLoghlen, Faylen
" Mary
" Thomas

Loghlen, Catherine Ny
" More Ny


13. County Clare 1659 Census

Barony of Burren

McLoghlen 07
O'Loghlen 06

titulado: Bryen O'Loghen, gent.
townland: Coskerine


Barony of Tulla

McLoghlen 12


Barony of Bunratty

Mcloghlin 10



14. Tipperary County 1659 Census

Barony of Clanwilliam

McLoghlin 11

Baronies of Eliogurty and Ikerim

Loghlen and Meloghlen 10



Barony of Iffay and Offay

McLoghlen and Meloghlen 10



15. Longford County 1659 Census

Barony of Ardagh

McLaughlin 15



16. Louth County 1659 Census

Barony of Atherdee

McLoghlin 11


17. Dublin County 1659 Census

Barony of Balrothery

Loghlin 09


"An Inquiry into the ownership and tenancy
of lands owned by the religious houses of
the city of Dublin"


"The Reformation in Dublin" 1536-1558


"Town of Mareton - two messuages, 40 ac.
arable, occupied by McLaghlyn and
McLaghlyn Oge, worth p.a., 40s."

     Special Report on Surnames in Ireland
     Matheson  1909
     Based on the birth indexes of 1890
     (five entries and upwards)



Surname   total births   By Province     Principle Counties

McLaughlin     391      Leinster  62   McLaughlin:  About 75% in
(var. McLoughlin)       Munster    7   Antrim, Donegal & L'Derry; 
                        Ulster   228   a few in Tyrone;  very few 
                        Connacht  94   very few elsewhere.
                                       McLoughlin:  Chiefly in    
                                       Dublin, and Connacht, but  
                                       found generally throughout 
                                       Ireland.

O'Loughlin      40      Leinster  12   Principally found in Clare 
                        Munster   21   and Dublin.
                        Ulster     3
                        Connacht   4

Loughlin        57      Leinster  18   Loughlin:  Principally 
(var. Laughlin)         Munster    7   found in Leitrim, Dublin,  
                        Ulster    22   and Kilkenny. 
                        Connacht  10   Laughlin:  Principally     
                                       found in Tyrone & Antrim



Loughnane       13      Leinster   1
                        Munster    6
                        Ulster     0
                        Connacht   6

Loughman         9      Leinster   4
                        Munster    5
                        Ulster     0
                        Connacht   1

Loftus          34      Leinster   3   23 in Mayo
                        Munster    2
                        Ulster     0
                        Connacht  29


Lawton          10      Leinster   1   7 in Cork
                        Munster    7
                        Ulster     2
                        Connacht   0



     Principle Names (by Province and County)


                         Births in 1890

     Ulster

         Donegal:  Gallagher  196;  Doherty  160;  Boyle  102;    
                   O'Donnell  102;  McLaughlin  81;  Sweeney 50.

         L'Derry:  Doherty  80;  McLaughlin  68.

         Tyrone:   Quinn  40;  Mullan  39;  Kelly  38;
                   Donnelly  34;  Gallagher  34;  McKenna  33;    
                   Campbell  32;  Hughes  31;  Wilson  30;        
                   McLaughlin  29;  O'Neill  29.

         Fermanagh:  Maguire  44;  McManus  30;  Dolan  23;       
                     McGovern  23;  Johnston  22;  McHugh  20;    
                     Cassidy  17;  Wilson  15;  Thompson  14;     
                     Elliot  13;  Irvine  13;  McLoughlin  12.



     Connacht

         Leitrim:  Kelly  30;  Reynolds  30;  Flynn 20;
                   McLoughlin  20.

         Sligo:    Brennan  31;  McLoughlin 28.



     Surnames by Province


    Ulster          Connacht       Munster           Leinster

McLaughlin 228    McLoughlin 94   McLoughlin  7    McLoughlin 62
O'Loughlin   3    O'Loughlin  4   O'Loughlin 21    O'Loughlin 12
Loughlin    22    Loughlin   10   Loughlin    7    Loughlin   18
Lawton       2    Loughnane   6   Loughnane  13    Loughnane   1  
                  Loughman    1   Loughman    5    Loughman    9  
                  Loftus     29   Loftus      2    Loftus      3  
                                  Lawton      7    Lawton      1


Donegal           Leitrim         Clare            Kilkenny
Tyrone            Sligo           Cork             Dublin
Fermanagh         Mayo            Tipperary        Longford
L'Derry           Roscommon       Limerick         Louth
Antrim                                             Meath 
Down                                               Westmeath
Monaghan                                           King's Co.