Setthathirath II
（重定向自Sai Ong Hue）
Setthathirath II (died 1735), also called Ong Lo and Sai Ong Hue, grandson of the great ruler Suliyavongsa, was the king of the Lao kingdom of Lān Xāng
He spent most of his early years as a prince of the royal house in exile at Huế (now in Vietnam). His father Prince Som Phou fled to Vietnam upon the placement by the nobles of his younger brother (Setthathirath II's uncle) Suliyavongsa was king of Lan Xang. Upon the 1694 death of King Suliyavongsa, a noble named Tian Thala ascended to the thrown. Within six months, Tian Thala was deposed by Ong Lo.