Final answer:
The Bharadwaj surname is associated with Brahmin communities, including Bengali Brahmins. Bharadwaj Brahmins are traditionally linked to the 'mouth' of the Purusha, a concept detailed in the Rig Veda. This is part of the Varnas system, reflecting India's historical social stratification.
Step-by-step explanation:
The surname Bharadwaj is traditionally associated with Brahmin communities across various regions in India, including Bengali Brahmins. In the historical context, the Brahmins were considered to originate from the 'mouth' of the Purusha, according to the ancient Indian text Rig Veda. This division reflects the Varnas, which is a system of social stratification. The Kshatriyas, or the warrior class, came from the 'arms', the Vaishyas, or the merchant class, from the 'thighs', and the Shudras, or the servile class, from the 'feet'. This spiritual and hierarchical division of society is symbolic and forms part of the broader Indian caste system. Hence, the Bharadwaj surname can indeed be found amongst Bengali Brahmins, as well as other Brahmin communities across India.