MacGiollaseachlainn, Kings of South Bregia


    "MacGiolla seachlainn, M'Galaghlin, MacGlaughlin, MacClachlin,
MacGlafilin, Claffin;  son of Giolla seachainn (servant of St.
Secundinus).
     The name of an old Meath family who were lords of Southern
Breagh, until soon after the Anglo-Norman invasion, when they lost
their power and were dispersed.  The present anglicised forms of
Mac Giolla Seaclainn cannot be distinguished from those of Mag
Loclainn, MacLachlainn, q.v.;  but that the family is still extant
is shown by the variant Mac Giolla Seachlainn.


     Woulfe  "Sloinnte Gaedheal is Gall"



     O'Dugan, in his Topography of Meath, describes the
MacGiollaseachlainns as residents of Deisceart Breagh, now the
parish of Dysart in Meath.

    O'Hogan:  Desceirt mbreg, in Meath;  the estate of the Mac
Gilla-sechlins;  south part of Bregia.  Kilglinn in the barony of
Upper Deece, near Kilcock, and Dunshaughlin in the barony of
Ratoath are in it.


    "Onomasticon Gaedelicon"




     Census of 1659  Dublin County

          Barony of Bairothery

               Principle Irish Names:  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 
          pls., 40 s.



     The Families of Tethba  1370 A.D.


     O Catharnaigh         Lord of Tethba
     O Cuinn                      "
     Mag Confiacla                "
     O Lachtnain                  "
     O Muiregan                   "
     O Flanagan             Lord of an Comar
     O Braoin               Lord of Breghmaine
     Mac Con Medha          Lord of Muinnter Laedagain
     MacAedha               Lord of Muinnter Tlamain
     MacTaidg               Lord of Muinnter Siothachain
     Mac Ambalgada          Lord of Callraighe
     Mac Garrgamna          Lord of Muinnter Maol tSinna
     O Dalaigh              Lord of Corca Adam
     O Muiredhaigh          Lord of Cinel Tlamain
     O Saolaidhe            Lord of West Dealbhna
     O Combraidhe           Lord of Ui Mac Uais
     O hAedha               Lord of Tir Tethba
     O Cearbhaill           Lord of Teamhair
     O Duinn                      "
     O Ronain               Lord of Cairbre Gabra
     O hAengusa             Lord of Gailenga Beaga
     Mac Gilla Sechlainn    Lord of South Bregh 

          Topographical Poems, edited by O'Donovan


   Annals of Ulster


     895 A.D.  Cellach, the son of Flannacan, Lord of all Bregia,
               slain.

     895 A.D.  Tolarg, joint king of South Bregia, slain;  son of
               Cellach, father of Tigernach and Fogartach;  gf.
               of Nial.

     896 A.D.  Flannacan, the son of Cellach, King of Bregia,
               slain.

     916 A.D.  Fogartach, the son of Tolarg, king of South
               Bregia, died.

     1013 A.D.  Gilla-Mochonna, the son of Fogartach, King of
                Bregia, died.  f. of Donnchad  1027;  f. of Gilla
                Sechnaill 

     1034 A.D.  Gilla-sechnaill, the son of Gilla-Mochonna, 
                slain.

     1121 A.D.  Cugaileang Mac Gillaseachnaill, Lord of South
                Breagha, was slain by the foreigners of
                Athcliath.

     1160 A.D.  Brodar, son of Turcall, Lord of Athcliath, was
                killed by Maelcron Mac Gillaseachnaill.

     1171 A.D.  Another predatory incursion was made by
                Tighearnan into South Breagha;  and he slew
                Gillan-Anain Mac Lughadha, i.e., chief of
                Cuirone, and Mac Gillaseachlainn, chief of South
                Breagha.

                Maelcron Mac Gillaseachnaill, Lord of South
                Breagha, died.



    It is impossible to piece together a detailed pedigree for the
MacGillaseachlainns based on the above entries in the Annals of
Ulster and the Annals of the Kingdom of Ireland, but a partial
pedigree may be sketched as follows:
 
 
 
 
 
 
                         Cellach
                          |
                         Flannacan  King of all Bregia  +896
                          |
                         Cellach   Heir of all Bregia  +895
                          |
                         Tolarg   King of South Bregia  +895
                          |
   _______________________|
  |                       |
 Tigernach               Fogartach  King of South Bregia  +916
                          |
      ____________________|
     |                    |
    Nial                 Gilla- Mochonna  King of Bregia  +1013
                          |
          ________________|
         |                |
        Donnchadh        Gilla Sechnaill   King of Bregia  +1034
        +1027             |
                          |
                          |
 
                         Cugaileang Mac Gillseachnaill  Lord of South Bregia
                         +1121
 
                         Maelcron Mac Gillaseachnaill   Lord of South Bregia
                         +1171





  
                                  87   Niall 'of the Nine Hostages'
                                  88   Conall Cremthainn
                                  89   Fearghus Ceirbhoil
                                  90   Diarmait Mac Ceirbhoil
                                        |
                   _____________________|_______________________
                  |                     |                       |
             91  Colman Mor            Colman Bec              Aodh Slaine  High King  +604
                                                                |
              (O'Melaghlin, Kings                          92  Congla  +630
               of Meath)                                        |
                                                           93  Conaing Cuirre  +662
                                                                |
          According to the Irish Names Society,            94  Congalach   +696
          a family named O'Loughlin (or more                    |
          probably  MacLoughlin)  claimed descent          95  Amalgaid   +718
          from Flannacan, the king of South Bregia,             |
          who died 896 A.D.  This sept whose memory        96  Conaing  +742
          has survived in oral tradition could only             |
          have been the MacGillaghlins.                    97  Congalach  +778
                                                                |
                                                           98  Cellach
                                                                |
                                                           99  Flannacan  King of South Bregia  +896
                                                                |
                                ________________________________|______________________________
                               |                                                               |
                         100  Mael Mithig  +919                                               Cellach  +895
                               |                                                               |
                         101  Congalach  High King  +956                                      Tolarg  +895
                               |                                                               |
                               |                                                  _____________|_______
                               |                                                 |                     |
                         102  Domnall                                           Tigernach             Fogartach  +916
                               |                                                                       |
                               |                                                     __________________|
                               |                                                    |                  |
                         103  Donchadh                                             Nial  +1027        Gilla-Mochonna  +1013
                               |                                                                       |
                               |                                                        _______________|
                               |                                                       |               |
                         104  Ceallach                                                Donncadh        Gilla-Sechnaill  +1034
                                                                                      +1027           Lord of South Bregia
                           (a quo O'Kelly
                            of Meath)                                                               (a quo Macgiollaseachlainn)
 
 

                            Septs descended from Aodh Slaine
                             "Linea Antiqua"
 
 
 
                                                           Aodh Slaine  High King +604
                                                            |
                                    ________________________|_____________________________________________________________
                                   |                                                                |                     |
                                  Diermott  +665                                                   Donchadh  +659        Congla  +630
                                  Cearnach sotal  +668                                             Finnachta Fledach     Conaing Cuirre
                                  Neill  +701                                                      Charles               Congalach  +696
                                   |                                                                |                     |
         __________________________|________________________________________________                |                     |
        |              |                        |                                   |               |                     |
       Fogartach      Cumascach                Conal grant                         Hugh Laigen     Tomaltach             Amalgaid  +718
       +724            |                        |                                   |               |                     |
        |              |                        |                                   |               |                     |
       Tolarg         Fogarta                  Neill                               Domnall         Cuinascach            Conaing  +742
        |              |                        |                                   |               |                     |
        |              |____________            |____________                       |               |                     |
        |              |            |           |            |                      |               |                     |
       Fogarta        Cairbre      Fogarta     Fergus       Dermot                 Muldoon         Cearnach              Congalach  +778
        |              |            |           |                                   |               |                     |
        |              |            |           |________________________           |               |                     |
        |              |            |           |            |           |          |               |                     |
       Neill          Flahertach   Congal      Cearnach     Muirdoch    Ailill     Adhnachan       Mulmodh               Cellach
        |              |            |           |            |           |          |                                     |
       Fogarta        Cormac       Ciarnach    Muldioman    Fogartach   Conor      Assachan     (O Mulmaedh)             Flannacan  +896
                       |            |           |            |           |          |                                     |
    (O Fogartach)     Maolmuire    Fogarta     Breslan      Spellan     Braonan    Muldoon         _______________________|
                       |            |                                                             |                 |
                      Braoin       Gill-mochonna                      (O Braonan)                Maelmithig +919   Cellach  +895
                                                                                  (O Maolduin)    |                 |
                    (O Braoin)   (MacGillcunny)          (O Spealain)                            Congalach  +956   Tolarg  +895
                                                                                                  |                 |
                                             (O Breaslain)                                       Domnall           Fogartach  +916
                                                                                                  |                 |
                                                                                                 Donoch            Gilla-Mochonna  +1013
                                                                                                  |                 |
                                                                                                 Ceallach          Gilla-Sechnaill  +1034
 
                                                                                             (O'Kelly of Meath)  (MacGiollaseachlainn
                                                                                                                  Lords of South Bregia)