Sulayman ibn Qutulmish ibn Isra’il ibn Bighu ibn Seljuq, the Seljuq Turkmen, king of Rūm. In general he was just, well-guided, and politically capable. His days were long, and he was the father of al-Sitt al-Saljuqiyyah (1), the consort of Imam al-Nasir.
His reign lasted twenty-nine years—others say a little over thirty. When he grew old, his sons gained ascendancy over him. Ibn al-Athir (2) states: “Among the territories he held were Konya, Aksaray, Sivas, and Malatya. He combined political skill with justice, possessed great majesty, and waged many campaigns.”
As he advanced in age, he distributed his lands among his sons. Thereafter his son Qutb al-Din placed him under restraint, so he fled to another son, who soon tired of him. At length his son Kaykhusraw took care of him, and he regretted having parcelled out his dominions.
He died in Konya, in mid-Shaʿban 588 AH. I say: It is claimed that he was secretly assassinated, but this has not been verified. After him his son Ghiyath al-Din Kaykhusraw assumed the sultanate. Malikshah ibn Qilij Arslan died a short time after his father, whereupon Kaykhusraw firmly established his rule; he was the father of Sultan Kaykaʾus.