Unknown Fate
What people feared instead, was the one residing in the dark forest, except the law that bans people from touching anyone from that clan.
Every organization that is strong enough to dare and say that they control a huge part of an empire, will obviously have some ancient documents That talk about that specific clan.
Well of course not everyone will believe it as it happened with the Aysi kingdom king, but in certain clans, sects, or organizations in general that are obviously old enough and strong.
Their oldest ancestors, well let's say that it depends on the ancestor's personality. But some of them will make sure to inform them not to mess around in the dark forest, and it's better to avoid anything that's related to that clan.