Where does “tronu” come from?

tronu (Basque) comes from Spanish trono, from Latin thronus, from Greek θρόνος, from Ancient Greek θρόνος, from Proto-Indo-European dʰer- — to support; to hold.

tronu (Basque): throne

Definitions

throne

Ancestry of “tronu”, step by step

Step	Language	Word	Meaning
1	Spanish	trono	throne
2	Latin	thronus	a throne; an angelic order
3	Greek	θρόνος	throne; monarchy, the royal office
4	Ancient Greek	θρόνος	seat; throne
5	Proto-Indo-European	dʰer-	to support; to hold

Every word from Proto-Indo-European dʰer- →Every word from Ancient Greek θρόνος →Every word from Greek θρόνος →