Where does “ఉర్దూ” come from?

ఉర్దూ (Telugu) comes from Classical Persian اردو, from Proto-Turkic ordu — army, camp.

Ancestry of “ఉర్దూ”, step by step

Step	Language	Word	Meaning
1	Classical Persian	اردو	—
2	Proto-Turkic	ordu	army, camp

ఉర్దూ — Etymology, Origin & Word History | Etymology Explorer