Where does “Pahlavian” come from?

Pahlavian (English) comes from English Pahlavi, from Persian پهلوی, from Middle Persian 𐫛𐫍𐫓𐫇𐫀𐫗𐫏𐫃, from Old Persian 𐎱𐎼𐎰𐎺 — Parthia.

Ancestry of “Pahlavian”, step by step

StepLanguageWordMeaning
1EnglishPahlaviThe Pahlavi script, a writing system derived from the Aramaic script and used to write several Iranian languages, the most common form of which was the Book Pahlavi
2Persianپهلویearlier, older
3Middle Persian𐫛𐫍𐫓𐫇𐫀𐫗𐫏𐫃—
4Old Persian𐎱𐎼𐎰𐎺Parthia
Every word from Old Persian 𐎱𐎼𐎰𐎺 →Every word from Middle Persian 𐫛𐫍𐫓𐫇𐫀𐫗𐫏𐫃 →Every word from Persian پهلوی →