Mewat is a historical region of Haryana and Rajasthan states in northwestern India. The loose boundaries of Mewat are not precisely determined but generally include Nuh, Faridabad, Gurgaon, Palwal districts of Haryana and Alwar district and some part of Bharatpur district of Rajasthan and also some part of Mathura district of Uttar Pradesh.
The region roughly corresponds to the ancient kingdom of Matsya, founded in the 5th century BCE. Mewati dialect, a slight variant of the Haryanvi and Rajasthani dialects of Hindi, is spoken in rural areas of the region. Mewati Gharana is a distinctive style of Indian classical music.
Hasan Khan Mewati is the most well-known chieftain of Mewat. He fought against Babur in Battle of Khanwa in 1527. Under Mughal rule Mewat came under Rajputs.
The title of Wali-e-Mewat was used by the Khanzada Rajput rulers of Mewat from 1372 till 1527, who ruled Mewat as an independent state. In 1372, Sultan Firuz Shah Tughlaq granted Raja Nahar Khan, the Lordship of Mewat. He established a hereditary polity in Mewat and proclaimed the title of Wali-e-Mewat. Later his descendants affirmed their own sovereignty in Mewat and ruled there till 1527.
The last Khanzada Rajput ruler of Mewat was Hasan Khan Mewati, who died in the Battle of Khanwa, his successors ruled Mewat as vassals of Mughal Empire.