The name of the town
Walla Walla actually comes from the Iora
language, one of myriad languages spoken by the Australian aborigines
The Iora tribe were the first tribe to have contact with Europeans when they sailed into Botany Bay in 1788.
The following is from The Fatal Shore by Robert Hughes:
"Over the next two days all the rest of the fleet arrived in Botany Bay. The Aborigines began to assemble in greater numbers on the rock strewn spits and white beaches. As Sirius sailed past Port Solander, Captain John Hunter watched them flourish their spears at her and cry, "Walla Walla!" These words, the first recorded ones spoken by a black to a white in Australia, meant "Go away!"