I don’t think so. Terra Australis as a name for the unknown “south land” has existed since antiquity, and Matthew Flinders championed its use for what was then simply New Holland. He believed there was no land further south than New Holland, so it was the fabled “Australia”.
“Australia” could also come from “Land of the Austrias” (Spanish Dynasty during the exploration of the Pacific Ocean by the Spanish explorers)
I don’t think so. Terra Australis as a name for the unknown “south land” has existed since antiquity, and Matthew Flinders championed its use for what was then simply New Holland. He believed there was no land further south than New Holland, so it was the fabled “Australia”.