Sheyf denoted the commanding officer of the Kiffu Guardians and also the sovereign of the worlds Kiffu and Kiffex. Beginning in 331 BBY, the Vos family provided all sheyfs, a tradition that ended when the Confederacy of Independent Systems conquered the planets in 22 BBY. The sheyf possessed unquestionable authority.
Among the sheyfs that are known are Kurlin Vos, Tinté Vos, and Zharia Vos.