Sas was a Voivode ruling over the lands of what was to become Moldavia between 1354-1358 in vassalage to the Hungarian King Louis. He succeeded his father, Dragoş, the first ruler of the country. Sas was in turn succeeded in 1359 by his own son, Balc, who managed to rule the country for only one year before being deposed by another Voivode from Maramureş, Bogdan.