Question

who used the word Hindustan firstly

Answer 1

Origin of the name Hindu In the words of Dr Frank Morales, the term “Hindu” is not a term that is inherent to the religion itself. Rather, the term is known to have been first coined by the ancient Persians, who were culturally, religiously, and perspectively extrinsic to the culture

Answer 2

hey mate,
here is your answer,
the term Hindustan was used firstly by the persians.
hopw it helps :-)