Where does “Chersonesus” come from?

Chersonesus (Latin) comes from Ancient Greek Χερσόνησος, from Ancient Greek νῆσος — island.

Ancestry of “Chersonesus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Χερσόνησος	—
2	Ancient Greek	νῆσος	island

Chersonesus — Etymology, Origin & Word History | Etymology Explorer