*Lafracoth O'Brien
born about 1076

father:
*Muirchearteach O'Brien
born about 1046
died 1119

mother:
*Dubhehoblaigh of Ossory
(end of information)

siblings:
unknown

spouse:
*Arnulph de Montgomery
born before 1074 <St. Germain Montgomery, Normandy, France>

children:
*Alice de Montgomery born after 1100 Pembrokeshire, Wales
*Philip de Montgomery born 1102 Penbrokeshire, Wales died 1177 Thornton, Scotland
Robert de Montgomery

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com