Where does “Ҳиндустон” come from?

Ҳиндустон (Tajik) comes from Persian هندوستان, from Persian ـستان, from Middle Persian -stʾn', from Proto-Indo-Iranian stáHnam, from Proto-Indo-European stéh₂-no-m, from Proto-Indo-European steh₂- — to stand.

Ancestry of “Ҳиндустон”, step by step

StepLanguageWordMeaning
1PersianهندوستانIndia
2Persianـستان-istan, -estan, -stan
3Middle Persian-stʾn'makes nouns of places; of indeterminate function
4Proto-Indo-IranianstáHnamthe act of standing; position, location, place
5Proto-Indo-Europeanstéh₂-no-m—
6Proto-Indo-Europeansteh₂-to stand
Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European stéh₂-no-m →Every word from Middle Persian -stʾn' →