Where does “Tracia” come from?

Tracia (Italian) comes from Latin Thrācia, from Ancient Greek Θρᾴκη, from Ancient Greek Θρᾷξ, from Ancient Greek θράσσω, from Proto-Indo-European dʰr̥h₂-gʰ-yé-.

Ancestry of “Tracia”, step by step

Step	Language	Word	Meaning
1	Latin	Thrācia	—
2	Ancient Greek	Θρᾴκη	Thrace, near which Samothrace is situated
3	Ancient Greek	Θρᾷξ	an inhabitant of Thrace; a Thracian
4	Ancient Greek	θράσσω	to trouble, stir
5	Proto-Indo-European	dʰr̥h₂-gʰ-yé-	—

Every word from Proto-Indo-European dʰr̥h₂-gʰ-yé- →Every word from Ancient Greek θράσσω →Every word from Ancient Greek Θρᾷξ →