What is "sayo"

Sayo is one of the woredas in the Oromia Region of Ethiopia. This woreda received its name from the old name of its administrative center, Dembidolo which is a separate woreda now. Part of the Kelem Welega Zone, Sayo is bordered on the south by the Gambela Region, on the west by Anfillo, on the north by Yemalogi Welele, on the northwest by Hawa Gelan, and on the east by the Birbir River which separates it from the Illubabor Zone.