Whenever the word Hindu comes up for discussion, at the very outset, it is announced that this word has its origin in the word Sindhu. This statement is taken for granted as an axiom and repeated by all. It is not seen in the public domain that anybody has ever raised any doubt on this explanation. The current explanation has gone ex silentio. Arguments may be put forward to expose many logical loopholes in the present explanation. This book tries to highlight the logical inconsistencies of the present explanation and at the same time tries to provide a more consistent alternative explanation of the origin of the word Hindu that has a traceable root to the core values of this way of life.