Answer: Koch dynasty
Notes: The Rajbanshi, also known as Koch-Rajbongshi, are an Indo-Aryan community historically associated with the Koch dynasty. They inhabit regions including Lower Assam, North Bengal, Bihar, Nepal, Bangladesh, and Bhutan. The community is classified as OBC in Assam and Bihar and Scheduled Caste in West Bengal. They have undergone Sanskritisation to claim Kshatriya status, linking their identity to the Koch dynasty.
