Where does “Kythira” come from?

Kythira (English) comes from Greek Κύθηρα, from Ancient Greek Κύθηρα.

Ancestry of “Kythira”, step by step

Step	Language	Word	Meaning
1	Greek	Κύθηρα	Kythira
2	Ancient Greek	Κύθηρα	—

Kythira — Etymology, Origin & Word History | Etymology Explorer