Where does “castor” come from?

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

Ancestry of “castor”, step by step

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

Words derived from “castor”

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