India was a great place to sell goods as India was the richest Nation back in those times, it was highly profitable to sell here. The traders had to cross the Sindhu river (presently the Indus river). The persians called Sindhu as Hindu and 'stan' means place, India was named Hindustan (a place beyond the river Hindu). The name Hindustan was used for many years and it is even still now used by some people.