The Seven and One

The Septem et Unus, translated from High Cipritine as "The Seven and One", are the eight original houses of the Familiae Martiales. With the exception of House Aurelos, each of the houses' founders were personally chosen by Aurelion Aurelos to become the primarchs of his reunified empire, selected for their unwavering loyalty and aptitude for leadership. Aurelion himself lead his own house, as the last Imperator of Palaven.
The member houses are House Aurelos of Palaven, House Abrudas of Carthaan, House Aventen of Parthia, House Caelax of Macedyn, House Fedorian of Epyrus, House Kandros of Thracia, House Mehrkuri of Digeris, and House Victus of Bostra.