Where does “Tartaristão” come from?

Tartaristão (Portuguese) comes from Portuguese tártaro, from Old Portuguese tartaro, from Medieval Latin tartarus, from Latin tartarus, from Ancient Greek Τάρταρος, from Ancient Greek Ταρτησσός, from Ancient Greek Ἡράκλειοι Στῆλαι.

Ancestry of “Tartaristão”, step by step

Step	Language	Word	Meaning
1	Portuguese	tártaro	Tatar; of Tartary; of Tatarstan
2	Old Portuguese	tartaro	—
3	Medieval Latin	tartarus	Tatar
4	Latin	tartarus	—
5	Ancient Greek	Τάρταρος	Tartarus
6	Ancient Greek	Ταρτησσός	—
7	Ancient Greek	Ἡράκλειοι Στῆλαι	—

Every word from Ancient Greek Ἡράκλειοι Στῆλαι →