Where does “Ostrelia” come from?

Ostrelia (Tok Pisin) comes from English Australia, from Latin terra austrālis incōgnita, from Latin auster, from Proto-Italic *austeros.

Ancestry of “Ostrelia”, step by step

StepLanguageWordMeaning
1EnglishAustralia
2Latinterra austrālis incōgnita
3LatinausterThe south wind; south
4Proto-Italic*austeros
Every word from Proto-Italic *austeros