I have just realized a very annoying thing: the "Austr-" in "Austria" means East, from German Öster. The "Austr-" in "Australia", on the other hand, means South, from Latin Australis.

Thank you, have a nice day.

@pulkomandy It seems like these two intermediary roots may be sharing a common Proto-Indo-European root:
https://www.etymonline.com/word/austral
austral | Etymology, origin and meaning of austral by etymonline

AUSTRAL Meaning: southern, of or pertaining to the south, 1540s, from Latin australis, from auster south wind; south,… See origin and meaning of austral.

@cagatayy @pulkomandy
So the prongs of the forked root meet up in the aurora australis?