Where does “Σαμοθρᾴκη” come from?

Σαμοθρᾴκη (Ancient Greek) comes from Ancient Greek Θρᾴκη, from Ancient Greek Θρᾷξ, from Ancient Greek θράσσω, from Proto-Indo-European dʰr̥h₂-gʰ-yé-.

Σαμοθρᾴκη (Ancient Greek): Samothrace, East Macedonia and Thrace, Greece

Definitions

Σαμοθρᾴκη traces back through two separate lines of ancestry.

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

Step	Language	Word	Meaning
1	Ancient Greek	Σάμος	Samos, Northern Aegean Islands, Greece
2	Ancient Greek	Σᾰ́μος	Samos, the other island whose people colonized...