Where does “se Deus quiser” come from?

se Deus quiser (Portuguese) comes from Portuguese Deus, from Old Portuguese Deus, from Latin Deus, from Latin dẹ̄vos, from Old Latin deivos, from Proto-Italic deiwos, from Proto-Indo-European deywós, from Proto-Indo-European dyew- — to be bright; sky, heaven.

se Deus quiser (Portuguese): God willing; A common expression of hope related...

Definitions

God willing; A common expression of hope related...

Ancestry of “se Deus quiser”, step by step

se Deus quiser traces back through two separate lines of ancestry.

via Portuguese Deus

Step	Language	Word	Meaning
1	Portuguese	Deus	God
2	Old Portuguese	Deus	—
3	Latin	Deus	God
4	Latin	dẹ̄vos	—
5	Old Latin	deivos	god, deity
6	Proto-Italic	deiwos	god, deity
7	Proto-Indo-European	deywós	god
8	Proto-Indo-European	dyew-	to be bright; sky, heaven

via Portuguese se

Step	Language	Word	Meaning
1	Portuguese	se	himself; herself; itself; themself; themselves;...
2	Old Portuguese	se	if
3	Latin	sī	if, supposing that
4	Proto-Italic	sei	so, thus
5	Proto-Indo-European	só	this; that

Every word from Proto-Indo-European dyew- →Every word from Proto-Indo-European deywós →Every word from Proto-Italic deiwos →