Where does “kastore” come from?

kastore (Basque) comes from Spanish castor, from Latin Castor, from Ancient Greek Κάστωρ, from Doric Greek κάστον.

kastore (Basque): beaver

Definitions

beaver

Ancestry of “kastore”, step by step

Step	Language	Word	Meaning
1	Spanish	castor	beaver
2	Latin	Castor	Castor
3	Ancient Greek	Κάστωρ	Castor
4	Doric Greek	κάστον	—

Every word from Doric Greek κάστον →Every word from Ancient Greek Κάστωρ →Every word from Latin Castor →