Arken's Heirs were an organisation of both Arken the Great's descendents by birth, as well as spiritual successors of his.
Several centuries ago, they attempted to take over Blackrock, after Arken's death, seeking to overthrow the city's government, and establish themselves as its new leaders. While the original plan was to form a council among themselves, many believe that eventually infighting would have seen one of them try to supplant and push out the others.
Their attempts to take over the city were foiled by the Order, and their names have been intentionally lost to history. Arken's name is to be remember, his deeds to be praised. His descendents' deeds are not, and their names are to be shunned.
To this date, when those who remember mention one of the names, others who do will spit on the ground, keeping the names buried.