Raja Nahar Singh was the Raja of the princely state of Ballabhgarh in Faridabad District of Haryana, India. He fought against The East India Company in the Indian Rebellion of 1857. The small kingdom of Ballabhgarh is only 20 miles from Delhi. Nahar Singh Stadium in Faridabad is named after him.
The Raja Nahar Singh metro station in Violet line is also named after him. From Wikipedia
