Where does “[[zora]], [[zořě]]” come from?

[[zora]], [[zořě]] (Old Czech) comes from Proto-Slavic zořa.

Ancestry of “[[zora]], [[zořě]]”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	zořa	—

[[zora]], [[zořě]] — Etymology, Origin & Word History | Etymology Explorer