Mirza Hadi Baig was a Barlas nobleman and scholar and a direct descendant of Hajji Baig, a paternal relative of Timur, the 14th century ruler of Persia and Central Asia. The Barlas were originally a prominent Turco-Mongol tribe who controlled territories in the Transoxianian region of Kish. Following Timur's rise to power within the tribe and amidst his conflict with Hajji Baig as leader of the Barlas, the family fled, with other members of the tribe, to Khorasan where they remained until the 16th century. In the early part of this century, Hadi Baig returned to the homeland of his ancestors and settled in Samarqand but left the city in 1530, perhaps due to domestic dissensions or an affliction, and moved along with his family and a retinue of two hundred persons consisting of servants and followers to northern India where the emperor Babur had recently established the Mughal dynasty.
In India
During the final year of Babur's reign, the family settled in the Punjab where Hadi Baig established a walled and fortified village near the River Beas and named it Islampur. He was granted a large tract of land comprising several hundred villages that together resembled a semi-independent territory by the imperial court of Babur and was also appointed the Qadhi of the surrounding district thereby giving him legal jurisdiction over the area. As the village was associated with the seat of the Qadhi, it came to be known as Islampur-Qazi. This name evolved into various forms based on cognates and the local dialect, until Islampur was dropped altogether, and it came to be known simply as Qadian, the name by which it is still known today.
Descendants
Hadi Baig’s descendants held Qadian for over 300 years maintaining close relations with the Mughal rulers and holding important offices within the imperial government. At its height, the family commanded a force of 7,000 soldiers under the Mughal emperor and, following the decline of Mughal power, were able to obtain de factoregional autonomy, becoming, in effect, the quasi-independent rulers of some sixty square miles. Most of this estate was lost however, first to the Sikhs in the 18th century and then to the British in the 19th. Perhaps the best known descendant of Hadi Baig was Mirza Ghulam Ahmad who founded the Ahmadiyya movement.