Qaimkhani or Kaimkhani (also spelled Qaim Khani and Kaim Khani) are a Muslim community. They converted from Hinduism to Islam in the 14th century.
The historian Dirk Kolff has queried whether the Kaimkhani have Turkbachcha origins.
They ruled between 1384 and 1731 with Fatehpur, Rajasthan as the capital, when they were defeated by the Shekhawats, Rajput Qaimkhani nawabs ruled in Fatehpur, Jhunjhunu and Singhana.
References
Qaimkhani Wikipedia(Text) CC BY-SA