Where does “Авраа́мъ” come from?

Авраа́мъ (Old Church Slavonic) comes from Ancient Greek Ἀβραάμ, from Hebrew אַבְרָהָם — Abraham.

Ancestry of “Авраа́мъ”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Ἀβραάμ	—
2	Hebrew	אַבְרָהָם	Abraham

Авраа́мъ — Etymology, Origin & Word History | Etymology Explorer