Recently had a rumor of a Giant Cheiftan that was supposed to be in Iross Highlands to the NE... I thought that was a bit odd, it being where the defending the outpost soldiers are stationed... anyway, I went there to look for him, and found just the usual wolves and werewolves and V-witch/corrupted sabres and one ordinary Hill Giant, no rumor boss. Looked ALL around every corner of the map a few times, nothing. Went back to Fogas and slept 6 hours, thinking maybe he'll be there when I check back... nope.