Where does “ثریا” come from?

ثریا (Urdu) comes from Classical Persian ثریا, from Arabic ثُرَيَّا.

Ancestry of “ثریا”, step by step

Step	Language	Word	Meaning
1	Classical Persian	ثریا	—
2	Arabic	ثُرَيَّا	—

ثریا — Etymology, Origin & Word History | Etymology Explorer