Rubrics
From Gnomon Chronicles

Two Rubric warriors stoning their enemy. The warrior on the right is thought to be Rumbustius, first king of the Rubrics. Note the effusion of blood: the Rubrics used the blood of their victims to make red ink for further wars of conquest and rubrication.
The Rubrics were an ancient tribe of warriors who worshiped the color red.
Rubricus
The Rubrics were conquered by Rubricus, although subsequent rebellions led to considerable erasure, ellision, and marginal scribbling.
Hierarchy
Hierarchy of the Rubric sub-tribes. Note the hexadecimal codes, indicating social status: