Maharaja Rao Birender Singh was an Indian politician. He served first as a minister in the state government of Punjab and then as Chief Minister of Haryana, and also served as a minister in Punjab state, Haryana state and the Union cabinet. He also served as the second speaker of Haryana state assembly in 1967. He coined an Indian political vocabulary Aya Ram, Gaya Ram to describe the practice of frequently floor-crossing by legislature.

Rewari is a city and a municipal council in Rewari district in the Indian state of Haryana. It is district headquarter of Rewari district. It is located in south-west Haryana around 82 km from Delhi and 51 km from Gurgaon. It lies in Ahirwal region.