Where does “Länsi-Australia” come from?

Länsi-Australia (Finnish) comes from Finnish Australia, from Latin australis, from Latin auster, from Proto-Italic *austeros.

Ancestry of “Länsi-Australia”, step by step

Länsi-Australia traces back through two separate lines of ancestry.

via Finnish Australia

StepLanguageWordMeaning
1FinnishAustralia—
2Latinaustralissouthern; Australian; the south pole
3LatinausterThe south wind; south
4Proto-Italic*austeros—

via Finnish länsi

StepLanguageWordMeaning
1Finnishlänsiwest; the West
2Proto-Finniclänciwest
3Proto-Finniclancilowland
Every word from Proto-Italic *austeros →Every word from Latin auster →Every word from Latin australis →