Hindustan

Hindūstān () is the Persian name for India, broadly referring to the Indian subcontinent. Also shortly known as Hind, it is the Iranic cognate of the Indic word Sindh, and originally referred to the tract of land on the left bank of the lower Indus River. Later, the term referred to the Indo-Gangetic plain, and became the classical name of the region in the Hindustani language, and it finally referred to the entire subcontinent since the early modern period. Since the Partition of India in 1947, Hindustan continues to be used to the present day as a historic name for the Republic of India.Hindustan was the classical Persian word for India, but when introduced to the subjects under Persianate rule, the subsequent culture which resulted from these events gave it another specific meaning that of the cultural region between the river Sutlej (end of Northwestern India) and the city Varanasi (end of northern India).
The region where the Ganga-Jamuni Tehzeeb and the Hindustani language traces its origins, it corresponds to the plains where the river Yamuna flows or the regions/states encompassing Haryana, Delhi and west and central Uttar Pradesh(more precisely, the central Indo-Gangetic plain).
Hindustan was also commonly spelt as Hindostan, which is even sometimes preferred in modern-day contexts to refer to the Indian subcontinent, especially to avoid the incorrect interpretation of Hindustan as land of followers of present-day Hinduism. Other ancient toponyms for the subcontinent include Jambudvīpa and Bharata Khanda.