Rao Tej Singh
Rao Tej Singh was an Yaduvanshi Ahir ruler of Haryana-Delhi-Rajasthan.  Under his rule, Ahirwal covered present day districts of Rewari, Mahendergarh, Narnual, Charkhi Dadri, Hissar, Jhajjar, Rohtak, Gurgaon, Najafgarh, Dwarka, Bahadurgarh, Pataudi, Sohna, Nuh, Bawal, Manesar, Rohini, Alwar and Jaipur. He was grandfather of famous Raja Rao Tula Ram.