The Thunderaxe Clan is the most highstanding of all the Arathi Highlands clan. There is no explaination of how the soceity of so-called Highland Orcs was established, but the most likely one is to be that some orcs broke away from the crazed Old Horde, and fled to the hideous hills of Arathi. Among these were Grast Thunderaxe Lok'Grom, his wife Mol'grom and other orcs. The soceity established in time, and ended up with seven different clans. The highest standing one was, as said, the Thunderaxe Clan.