Where does “Punjab” come from?

Punjab derives from Urdu پنجاب, from Persian پنجاب combining پنج meaning "five" and آب meaning "water," ultimately from Proto-Indo-European h₂ep-.

Ancestry of “Punjab”, step by step

Step	Language	Word	Meaning
1	Punjabi	ਪੰਜਾਬ//پنجاب	—

Punjab — Etymology, Origin & Word History | Etymology Explorer