The Rajbanshi, also Rajbongshi and Koch-Rajbongshi,"In West Bengal and Bihar, they are known as "Rajbongshi and "Rajbanshi", " in Assam as "Koch," and "Koch-Rajbongshi," and in Meghalaya mainly as "Koch." are peoples from Lower Assam, North Bengal, eastern Bihar, Terai region of eastern Nepal, Rangpur division of North Bangladesh and Bhutan"The Rajbanshi as a social and cultural group are well-known to historians, sociologists and anthropologists working on northeast India.