1. Yelu Abaoji (Liao Taizu) A.D. 907-926
2. Yelu Deguang (Taizong) 927-947 (2nd son of Abaoji)
3. Yelu Ruan - Wuyu (Shizong) 947-951 (Abaoji's grandson - son of Abaoji's eldest son, Yelu Bei.
4. Yelu Jing (Muzong) 951-969 (son of Yelu Deguang)
5. Yelu Xian (Jingzong) 969-982 (son of Yelu Ruan - the remainder of the succession would stay in the line of Abaoji's FIRST son)
6. Yelu Longxu (Shengzong) 982-1031 (son of Yelu Xian)
7. Yelu Zongzhen (Xingzong) 1031-1055 (son of Yelu Longxu)
8. Yelu Hongji (Daozong) 1055-1101 (son of Yelu Zongzhen)
9. Yelu Yanxu (Tianzuo) 1101-1125 (grandson of Yelu Hongji - his father, Yelu Jun, died in 1077)
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Adapted from Mote, F.W. Imperial China: 900-1800. Harvard University Press. 1999. Cambridge, MA.
You might also want to add the rulers of the Western Liao (Karakhitai):
Emperor Tianyou 天佑 (Dezong 德宗), Yelu Dashi 耶律大石. Reigned 1124-1143 [there is much controversy about when the Western Liao was founded, but the most accepted theory is that Yelu Dashi assumed the title of king in 1123 or 1124, and only assumed the title of emperor in 1131 or 1132]
Empress Gantian 感天, Tabuyan 塔不烟. Reigned 1144-1150
Emperor Renzong 仁宗, Yelu Yilie 耶律夷列. Reigned 1151-1163
Empress Chengtian 承天, Yelu Pusuwan 耶律普速完. Reigned 1164-1177
Last Emperor (Mozhu 末主), Yelu Zhilugu 耶律直鲁古. Reigned 1178-1211.
In 1211, the chieftain of the Naiman 乃蛮 Mongols, Kücülüg or Kushlik (Chinese: Quchulü 屈出律) fled to the Western Liao after being defeated by Chinggis Khan. He overthrew Yelu Zhilugu and made himself the ruler, still using the state names of Western Liao and Karakhitai. In 1218, Chinggis Khan invaded the Western Liao and defeated Kücülüg, thus bringing the Western Liao state to an end. He then went on to destroy the Western Liao's allies, the Muslim Khwarizm empire.