Rao Bahadur (also Raobahadur and Rai Bahadur, abbreviated R.B.) is a title of honor issued in India to individuals who have performed great service to the nation. It is known as Roy Bahadur in Bengal.
Literally translated, "Rao" implies "prince", and "Bahadur" means "most honorable". It is the equivalent of an Order of the British Empire (OBE). This title was awarded to Indians, both Hindu and Christian. During the era of British rule, the Rao Bahadur was accompanied by a medal. The equivalent title for Muslim and Parsi subjects was Khan Bahadur.