Banbhainsa surname is an Indian last name. Banbhainsa surname also indicates the caste of person. Banbhainsa surname definition is (Wild buffalo.) A section of Rawat (Ahir).. People with Banbhainsa surname can also be found in other south asian countries like Pakistan, Bangladesh, Nepal and Sri Lanka. Banbhainsa surname definition is from a survey conducted during British rule in India. Many surnames in India indicate the type of work done by the person or by someone in family from whom the family inherited the surname. Surnames help spread casteism in India. One of the intellectuals suggested to drop surnames in India so that people can overcome caste differences easily.