Where does “सर्राफ़” come from?

सर्राफ़ (Hindi) comes from Urdu صراف, from Arabic صَرَّاف — moneychanger.

Ancestry of “सर्राफ़”, step by step

Step	Language	Word	Meaning
1	Urdu	صراف	—
2	Arabic	صَرَّاف	moneychanger

सर्राफ़ — Etymology, Origin & Word History | Etymology Explorer