Seljuk

Seljuk, son of Duqaq, gave his name to a dynasty he never lived to see. His father, remembered by the epithet Temir-Yaligh, "Iron Bow," served the ruler of the Oghuz Yabgu state on the steppe north of the Aral Sea, and Seljuk himself rose to the rank of subashi, commander of the army. A quarrel with the Yabgu's court — tradition blames the suspicions of the ruler's wife — drove him to break away around 985, leading his clan, the Qiniq branch of the Oghuz, with their herds and tents to the frontier town of Jand on the lower Syr Darya.

Jand stood on the boundary between the pagan steppe and the Muslim world, and there Seljuk and his followers converted to Sunni Islam. The decision remade the clan's identity. Seljuk refused to collect tribute from Jand on behalf of his former overlord, declaring that Muslims would not pay tax to infidels, and his horsemen began fighting instead as ghazis and as mercenaries in the wars between the Samanids and the Karakhanids in Transoxiana. The names of his sons — Mikail, Arslan Isra'il, Musa, and Yunus, echoing Michael, Israel, Moses, and Jonah — have prompted long scholarly debate about earlier contact with Khazar Judaism or eastern Christianity, though the family's Islam was never in doubt after Jand.

Mikail, the father of Tughril and Chaghri, died young in a raid, and tradition holds that his sons were raised in their grandfather's household. Seljuk himself died at Jand around 1007, reputedly at an age past one hundred. He had ruled no state, struck no coins, and held no title beyond chieftain, yet the trajectory he set — out of the steppe, into Islam, toward the settled lands — carried his grandsons to Baghdad within five decades. His tomb at Jand remained a site of memory for the dynasty, and every sultan of the line, from Persia to Anatolia, traced legitimacy to the old commander who had crossed the river and changed his people's faith.