Moora Mooras were pixies in the Australian Brownie Guide mythology and this was a common name for Sixes.
"The Moora Mooras are the good fairies who help all the creatures in the bush. Perhaps a bird has injured its wing; they bandage it and look after the little bird until it is better. They especially watch out for baby kangaroos who might have fallen out of their mother's pouch." (The Australian Brownie Guide Handbook. 1975)