Where does “蘇非” come from?

蘇非 (Chinese) comes from Arabic صُوفِيّ, from Arabic صوف.

Ancestry of “蘇非”, step by step

Step	Language	Word	Meaning
1	Arabic	صُوفِيّ	a Muslim mystic or ascetic; man of wool; Sufi
2	Arabic	صوف	—