Where does “Ἰεφθάε” come from?

Ἰεφθάε (Ancient Greek) comes from Hebrew יִפְתָּח.

Ancestry of “Ἰεφθάε”, step by step

Step	Language	Word	Meaning
1	Hebrew	יִפְתָּח	—

Ἰεφθάε — Etymology, Origin & Word History | Etymology Explorer