. . . "diarchal" . "two" . "Duumvirate" . . "diarchical" . . "Diarchy" . "dyarchy" . "Dual kingship" . "diarchies" . . "Diarchy" . "diarchic" . "diarchy system" . "two kings simultaneously" . "dyarchical" . "dual kingship" . "Diarch" . . . "diarchy" . "two ruling clans" . . . . "diarch" . . "dual leadership" . "diarchial" . . . "Two" . . . "diarchs" . "hereditary kings" .