Muircetrach O'Brien
Muircetrach was born about 1055 in Ireland.  He died in 1119 in Lismore, Waterford, Ireland.

 Dubichobhiegh of Ossory
Dubichobhiegh of was born about 1052 in Ossory, Ireland.  She died in 1098 in Ireland.

 Lafracoth O'Brien
Lafracoth was born about 1078 in Munster, Ireland.  She died in Pembrokeshire, Wales.

 Blathmin O'Brien
Blathmin was born about 1089 in Munster, Ireland.