The word Hindu is not a religious word. It is secular in origin. It is derived from the word Sindhu, which is the name of a major river that flows in the northwestern region of the Indian subcontinent. The ancient Greeks and Armenians used to refer the people living beyond the river Sindhu as Hindus and gradually the name struck. When the Muslims came to the sub continent they called the people living in the region as Hindustanis to distinguish them from the foreign Muslims. Subsequently when the British established their rule, they started calling the local religions collectively under the name of Hinduism.
