The word “koala” comes from the Dharuk word gula. Closely related words appear in other Australian Aboriginal languages, including:

In the Blue Mountains of New South Wales, Aborigines called Koalas by the word Cullawines
Near Sydney, Aborigines called Koalas by the word Koolahs
In the Murray Region, Aborigines called Koalas by the word Karbors
Other Aboriginal names for Koalas [...]