Piroz
No. Piroz is of Middle Persian origin and is used in Kurdish and Iranian contexts; it is used by Muslim communities but is not originally Arabic.
Piroz means 'victorious' or 'triumphant', deriving from Middle Persian pērōz / pēruz.
Yes. Piroz is used among Muslim Kurds and Iranian-speaking communities as a laudatory personal name.
Yes. Forms like Peroz/Piruz are attested in Middle Persian sources and royal epigraphy; the root is historically attested.
Common regional variants include Piruz, Peroz, Pirouz and Firoz.