Where does “Turkmenistāna” come from?

Turkmenistāna (Latvian) comes from Turkmen Türkmenistan, from Turkmen Türkmen, from Turkish Türkmen, from Persian ترکمن, from Old Turkic 𐱅𐰇𐰼𐰜, from Proto-Turkic *tür(ü)k — Turk, Turkic people.

Ancestry of “Turkmenistāna”, step by step

StepLanguageWordMeaning
1TurkmenTürkmenistan—
2TurkmenTürkmenTurk-like; Turkmen
3TurkishTürkmenTurk-like
4PersianترکمنTurkmen (member of one of various Turkic ethnic groups in Central and West Asia)
5Old Turkic𐱅𐰇𐰼𐰜Turk
6Proto-Turkic*tür(ü)kTurk, Turkic people
Every word from Proto-Turkic *tür(ü)k →Every word from Old Turkic 𐱅𐰇𐰼𐰜 →Every word from Persian ترکمن →