Where does “Түркмөнстан” come from?

Түркмөнстан (Kyrgyz) comes from Kyrgyz -стан, from Persian ـِسْتَانْ, from Old Persian 𐎿𐎫𐎠𐎴, from Proto-Iranian stā́nam, from Proto-Indo-Iranian stʰáHnam, from Proto-Indo-European *steh₂-.

Ancestry of “Түркмөнстан”, step by step

Step	Language	Word	Meaning
1	Kyrgyz	-стан	Suffix to form country names when added to names...
2	Persian	ـِسْتَانْ	place of
3	Old Persian	𐎿𐎫𐎠𐎴	place
4	Proto-Iranian	stā́nam	—
5	Proto-Indo-Iranian	stʰáHnam	—
6	Proto-Indo-European	*steh₂-	—

Every word from Proto-Indo-European *steh₂- →Every word from Kyrgyz -стан →Every word from Proto-Indo-Iranian stʰáHnam →