Dear before independence before british before dutch before mugals before all the invansions there was a place called sindh ie banks of sindhu river where the people called aryans who were migrants from europe lived. the natives of sindh was forced to flee southern side as aryans who were strong and much developed in warfare.there starts the indian history after long time arabs who came to india for bussiness called this place hind meaning land in the banks of sindhu river.later people who lived there was called hindus. this is a authentic version of how the name hindu derived by historians and also this is an established point in all historic books.
Now a days also if u ask any people who works in middle east the major arabs call indians Hindi. it is not only because hindi is our national language but also we are from hind.
AND IF we comes out of india and work for ur family of course even ur are hindu muslim christian sikh or parsi, u have one label as INDIAN . so let it b like this WAKE UP INDIANS