Shams al-Muluk Duqaq

Abu Nasr Shams al-Muluk Duqaq (died 8 June 1104[1]) was the Seljuq ruler of Damascus from 1095 to 1104.

When their father died in 1095, Ridwan claimed Syria for himself, and Duqaq initially inherited territory in the Jezirah and lived with his brother in Aleppo.

Over the winter of 1097–1098, during the siege of Antioch by the Crusaders, Yaghi-Siyan and his son Shams ad-Dawla sought help from Duqaq.

While occupied in Syria, Duqaq's possessions in the Jezirah were seized by some rebellious vassals; in 1099 he recaptured Diyarbakr.

In 1100, Duqaq ambushed Baldwin I of Edessa at Nahr al-Kalb, outside Beirut, while the latter was on his way to Jerusalem to succeed his brother Godfrey of Bouillon as king.