Where does “Sardonian” come from?

Sardonian (English) comes from Latin sardonius, from Ancient Greek Σαρδόνιος, from Ancient Greek σαρδάνιος, from Ancient Greek σαρδάνη.

Sardonian (English): Sardonic

Definitions

Step	Language	Word	Meaning
1	Latin	sardonius	Of sardonyx
2	Ancient Greek	Σαρδόνιος	Sardinian
3	Ancient Greek	σαρδάνιος	scornful, bitter, grim
4	Ancient Greek	σαρδάνη	—