Where does “پنجاب” come from?

پنجاب (Sindhi) comes from Classical Persian پَنْجَاب.

Ancestry of “پنجاب”, step by step

StepLanguageWordMeaning
1Classical Persianپَنْجَاب
Every word from Classical Persian پَنْجَاب
پنجاب — Etymology, Origin & Word History | Etymology Explorer