Where does “castor” come from?

castor (Romanian) comes from French castor, from Middle French castor, from Old French castor, from Latin Castor, from Ancient Greek Κάστωρ, from Doric Greek κάστον.

castor (Romanian): beaver

Definitions

beaver

Ancestry of “castor”, step by step

Step	Language	Word	Meaning
1	French	castor	beaver
2	Middle French	castor	—
3	Old French	castor	beaver
4	Latin	Castor	Castor
5	Ancient Greek	Κάστωρ	Castor
6	Doric Greek	κάστον	—

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