Where does “Қазоқистон” come from?

Қазоқистон (Tajik) comes from Tajik -истон, from Classical Persian ـِسْتَان, from Middle Persian -stʾn', from Old Persian 𐎿𐎫𐎠𐎴, from Proto-Iranian stā́nam, from Proto-Indo-Iranian stʰáHnam, from Proto-Indo-European *steh₂-.

Ancestry of “Қазоқистон”, step by step

StepLanguageWordMeaning
1Tajik-истонistan
2Classical Persianـِسْتَان—
3Middle Persian-stʾn'makes nouns of places; of indeterminate function
4Old Persian𐎿𐎫𐎠𐎴place
5Proto-Iranianstā́nam—
6Proto-Indo-IranianstʰáHnam—
7Proto-Indo-European*steh₂-—
Every word from Proto-Indo-European *steh₂- →Every word from Middle Persian -stʾn' →Every word from Classical Persian ـِسْتَان →