Hinduism
The word Hindu is taken from the Indo-Aryan/Sanskrit word  Sapta Sindhu, which is Sanskrit name for the Indus River which lies west of the border of India and Pakistan. According to Gavin Flood, The word Hindu was used by Persians for the people who live beyond the Indus River, Inscription of Darius I which was written around 550–486 BCE also refer Hindu as the people who live beyond the Indus River. These records didn't refer Hindu as a religion. The earliest record which refer Hindu as religion may be the 7th-century CE Chinese text Record of the Western Regions by Xuanzang, and 14th-century Persian text Futuhu's-salatin by 'Abd al-Malik Isami. This is because the name if the religion is called Hinduism, not Hindu.