The Dagar brothers were Ustad Nasir Zahiruddin (1933–1994) and Ustad Nasir Faiyazuddin (1934–1989), a pair of North Indian singers of dhrupad. They were the 19th generation of an unbroken chain of the Dagarvani Dhrupad tradition. Their father, the great vocalist Ustad Nasiruddin Khan died in 1936, consequently they learned dhrupad from their elder brothers, the senior Dagar Brothers, Ustad Nasir Moinuddin Dagar and Ustad Nasir Aminuddin Dagar.
The brothers were born in Indore, Madhya Pradesh. Their musical career unfolded in Delhi. After the untimely demise of Ustad Nasir Moinuddin Dagar at Calcutta in 1967 they became the only pair carrying on the jugalbandi singing. The Dagar Brothers played a very important role in the revival of Dhrupad tradition, carrying forward the great work done by their elder brothers. They took dhrupad to Europe and America and Japan. In India they formed the Dhrupad Society to popularise dhrupad inviting exponents from all gharanas to share their platform. They also trained many students, including Ustad Faiyaz Wasifuddin Dagar, the son of Nasir Faiyazuddin Dagar, who is keeping the family tradition alive along with other dagarvani exponents.