Where does “시드니” come from?

시드니 (Korean) comes from English Sydney, from French Saint-Denis.

Ancestry of “시드니”, step by step

StepLanguageWordMeaning
1EnglishSydneyand the most populous city in Australia
2FrenchSaint-Denis
Every word from French Saint-DenisEvery word from English Sydney
시드니 — Etymology, Origin & Word History | Etymology Explorer