Where does “Tuscule” come from?

Tuscule (French) comes from Middle French Tuscule, from Latin tusculum, from Latin tus, from Ancient Greek θύος, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “Tuscule”, step by step

Step	Language	Word	Meaning
1	Middle French	Tuscule	—
2	Latin	tusculum	a small amount of incense
3	Latin	tus	Alternative spelling of thūs; incense,...
4	Ancient Greek	θύος	burnt sacrifice, offering; kind of cake
5	Proto-Indo-European	dʰewh₂-	smoke; mist, haze

Every word from Proto-Indo-European dʰewh₂- →Every word from Ancient Greek θύος →Every word from Latin tus →