Sethian

But if these hippopotami are Sethian, how could Apophis, a professed follower of Seth, allow this to go on in his own city of Avaris?

At any rate this shows that Sekhemib-Peribsen certainly did not pass into history as a Sethian schismatic or heretic.

Associated with Horus: in the Late Period the nome-sign is often written with a falcon (Horus) on the back of an oryx, which itself was a Sethian animal.