The city of Ajmer gets its name from Ajay Meru

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Ajmer was originally known as Ajayameru. Maharaja of Parmar Rajputs founded the Ajmer city in the 11th-century, which was admired from Chahamana king Ajaydeva. Historian Dasharatha Sharma notes that the earliest mention of the city's name occurs in Palha's Pattavali, which was copied in 1113 CE (1170 VS) at Dhara. This suggests that Ajmer was founded sometime before 1113 CE. A prashasti (eulogistic inscription), issued by Vigraharaja IV and found at Adhai Din Ka Jhonpra (Sanskrit college), states Ajayadeva (that is Ajayaraja II) moved his residence to Ajmer.
A later text, Prabandha-Kosha states that it was the 8th-century king Ajayaraja I who commissioned the Ajayameru fort, which later came to be known as the Taragarh fort of Ajmer. According to historian R. B. Singh, this claim appears to be true, as inscriptions dated to the 8th century CE have been found at Ajmer. Singh theorises that Ajayaraja II later expanded the town area, constructed palaces, and moved the Chahamana capital from Shakambhari to Ajmer.
In 1193, Ajmer was annexed by the Ghurids and later was returned to Gaur Rajput rulers under condition of tribute. +5%gst