Das (surname) in the context of "Bairagi Brahmin"

Bairagi Brahmin or Vaishnav Bairagi or Vaishnav Brahmin is a Hindu caste. They are Hindu priests. They are sedentary rasik (temple dwelling or temple priest) Brahmin members of the Vaishnava sampradayas, especially the Ramanandi Sampradaya. According to K.S. Singh, the community uses different surnames/titles in different states and union territories of India; these are: Swami, Bairagi, Mahanta, Maharaj, Vaishnav, Bawa, Pandit, Purohit, Goswami, Sharma, Das, Adhikari, Brahmachari. They are Vaishnav, and wear the sacred thread. A majority of Bairagi Brahmin is found in Uttar Pradesh, Bihar, Jharkhand, West Bengal, Assam, and Odisha. Vaishnavas are considered to be part of the 'upper castes' of India.