Torlogh of Ireland O'Brien
Torlogh of Ireland was born in 1009.¹ 

 Dirborgaill Ingen of Ossory Taidg
Dirborgaill Ingen of Ossory was born about 1008.¹   Dirborgaill Ingen of Ossory is no longer alive.

 Mortogh More of O'Brien
Mortogh More of was born about 1056.¹