Abu Mansur Sabuktigin (Persian: ابو منصور سبکتگین‬‎) (ca 942 – August 997), also spelled as Sabuktagin, Sabuktakin, Sebüktegin and Sebük Tigin, was the founder of the Ghaznavid dynasty, ruling from 977 to 997. In Turkic the name means beloved prince.

Sabuktigin lived as a slave during his youth and later married the daughter of his master Alptigin, the man who seized the region of Ghazna (modern Ghazni Province in Afghanistan) in a political fallout for the throne of the Samanids of Bukhara. Although the latter and Sabuktigin still recognized Samanid authority, and it was not until the reign of Sabuktigin's son Mahmud that the rulers of Ghazni became independent.

When his father-in-law Alptigin died, Sebuktigin became the new ruler and expanded the kingdom after defeating Jayapala to cover the territory as far as the Neelum River in Kashmir and the Indus River in what is now Pakistan.

Sebuktigin was of Turkic origin born around 942 CE in what is today Barskon, in Kyrgyzstan. The ruler of Barskhan was one of the Qarluqs according to the Persian geographical treatise Hudud al-'Alam. It is therefore probable that the Ghaznavids had Qarluq ancestry. He was captured by the neighbouring Tukhsis in a tribal war and sold at the Samanid slave market at Chach. He rose from the ranks of Samanid slave guards to come under the patronage of the Chief Hajib Alptigin.

...
Wikipedia