The Backoloan people in Chiali, Tainan County, are the most powerful of the sub-tribal groups. Prior to the Dutch occupation of Taiwan, they even maintained their own kingdom.
位於今天台南縣佳里鎮的蕭壟社，是西拉雅支族中實力最強的社族，在荷蘭人佔領台灣之前，一直維持獨立王國的姿態。