Yaghi-Siyan

Yağısıyan, also known as Yaghi-Siyan (; died 1098) was a Seljuk Turkoman commander and governor of Antioch in the 11th century. Although little is known about his personal life he was an important figure of the First Crusade.

==Governor of Antioch== In the 1080s most of Anatolia and Syria were ruled by two relatives of the Great Seljuk Empire sultan Malik-Shah I: Anatolia was ruled by Suleiman ibn Qutulmish, the sultan's cousin, and Syria by Tutush I, the sultan's brother. Between the two regions was the principality of Philaretos Brachamios, who, while paying nominal allegiance to the Byzantine Empire, was de facto an independent ruler over the region that also included Antioch ().