Mechanically-speaking, Half-Orcs in Pathfinder: Domain are identical to those found in the Pathfinder Roleplaying Game p25. You can also find Racial Information on them on the Pathfinder SRD Website.
XP Cost: 8,000
Tulun Half-Orcs: Like Eb’ari, Half-Orcs never truly belong in the societies they find themselves in, but unlike Eb’ari Half-Orcs often face open aggression and hostility and it is a rare Half-Orc who remains good of heart after a lifetime of distrust and persecution. Regardless, most Half-Orcs grow up to be hardy in body and strong in will, as those that aren’t broken are made stronger. Possessing the strength and endurance of their Orc parents and granted the tenacity and adaptability of their Human parents, Half-Orcs tend to be very capable at whatever they set their mind to. They usually exist on the fringes of society in either Enotia in the north or Midian in the south, and are just as likely as not to be religious. Some Half-Orcs find that religion helps make sense of a cruel life, whereas others disdain it believing that such things wouldn’t happen if the Gods truly cared about life on Tulun.
Place of Origin: Lacking the social graces to be accepted in Omishiru for long and finding the myriad races of Kajir oddly unwelcoming of outcasts, most Half-Orcs come from either Enotia in the north or Midian in the south.