Where does “Safar” come from?

Safar (English) comes from Arabic صَفَر, from Arabic صَفِرَ — to be empty.

Ancestry of “Safar”, step by step

Step	Language	Word	Meaning
1	Arabic	صَفَر	—
2	Arabic	صَفِرَ	to be empty

Safar — Etymology, Origin & Word History | Etymology Explorer