Muircetrach O'Brien
Birth date:
Birth place:
, , , Ireland
 
Death date:
  1119
Death place:
  , , , Ireland

O'Brien Family

Parents:
Father: Toirrdelbach O`Brien
Mother: Derbforgaill Na Ossory
Spouse:
Spouse: Dubichobhiegh of Ossory
 
Siblings:
Diarmait Mactoirrdelbaig o Brien
Muirchertach Ii O'Brien
Muirchertach Ii MacToirdelbaig O'Brien
Diarmait macToirrdelbaig
Muircetrach O'Brien
Marchertus O'Brien
Tadg macToirrdelbaig O'Brien
Teige O' Brien
Dermot (Dermod) O'Brien
Donnchad MacToirrdelbaig O'Brien
Murtagh O'Brien
Muirchertach Ua Briain High Ireland
Children:
Lafracoth,
Lafracoth O'Brien