The origin of the word Hinduism is from the Persian name for the land around the Indus River, called Hindustan. This is where the religious ideas are thought to have originated.
Sanatana dharma is timeless and the duty of all people everywhere. It extends to daily life, guiding every Hindu about the right way to worship and behave.
The disciplined who stays content with thoughts and mind on Me intent, is self-controlled inflexibly, loves Me and he is dear to Me.: 'Bhagavad Gita 12.14'