Where does “Jeová” come from?

Jeová (Portuguese) comes from Latin Iehova, from Hebrew יהוה, from Proto-Semitic *haway-.

Ancestry of “Jeová”, step by step

Step	Language	Word	Meaning
1	Latin	Iehova	—
2	Hebrew	יהוה	YHWH, Yahweh, Jehovah; God; Yahweh
3	Proto-Semitic	*haway-	—

Jeová — Etymology, Origin & Word History | Etymology Explorer