The Sirayans are further subdivided into three tribal branches-the Siraya, the Makattao and the Taivoan. The largest branch-the Siraya-is further subdivided into the four settlements of Sincan, Mattow, Souloangh, and Backoloan.
其下分為西拉雅支族、瑪卡道、大武壟三亞族，最大的西拉雅支族又有新港社、麻豆社、蕭壟社、目加溜灣社四大社。