Explanation:

 Maharana Kumbha ruled Chittorgarh in the 14th century. Due to a dispute with his younger brother Kshemkarn he expelled him from his territory. Kshemkarn's family was a refugee for some time and lived in the Aravali ranges in near south of Rajasthan. In 1514, his son Rajkumar Surajmal became the ruler of Devgarh, and this Raj later came to be known as Pratapgarh Raj. As the environment of Devgarh was not found to be suitable by the royal family, one of the descendants of Raja Surajmal, Rajkumar Pratapsingh started to build a new town near Devgarh in 1698 and named it Pratapgarh