Where does “Sidni” come from?

Sidni (Pitcairn-Norfolk) comes from English Sydney, from French Saint-Denis.

Ancestry of “Sidni”, step by step

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