Source: – Subhash Kak.
"Bakshi in Mongolian means ‘professor’. The word came from bikshu. The Bakshi title was carried by muslims to India." @Shruti_paris
“Mongols gave to the world paper currency; they introduced steam.They used steam to move the prayer wheels." https://t.co/ceSmdmmuuZ
— Subhash Kak ☀️ (@subhash_kak) August 28, 2019
Another derivation is that Bakshi is from Sanskrit वक्ष, vaksha, chest.
That is "chest of money" or "treasury".
So Bakshi was the treasurer.
— Subhash Kak ☀️ (@subhash_kak) August 28, 2019