Where does “Spiritu Sancto” come from?

Spiritu Sancto (Spanish) comes from Latin Spiritus Sanctus, from Ancient Greek Πνεῦμα τὸ Ἅγιον, from Ancient Greek πνεῦμα, from Ancient Greek πνέω, from Proto-Indo-European pnew- — to pant, breathe.

Ancestry of “Spiritu Sancto”, step by step

Step	Language	Word	Meaning
1	Latin	Spiritus Sanctus	The Holy Spirit, the Holy Ghost
2	Ancient Greek	Πνεῦμα τὸ Ἅγιον	The Holy Ghost, the Holy Spirit
3	Ancient Greek	πνεῦμα	air; wind; breath
4	Ancient Greek	πνέω	I blow; to breathe; 458 BCE, Aeschylus, The...
5	Proto-Indo-European	pnew-	to pant, breathe

Every word from Proto-Indo-European pnew- →Every word from Ancient Greek πνέω →Every word from Ancient Greek πνεῦμα →