In Australian Aboriginal mythology (specifically: Kamilaroi), Birrahgnooloo is a goddess of fertility who would send floods if properly asked. Ash et al. (2003) spell her name as 'Birra-ngulu', i.e. the vowels are short.
She is one of two wives of Baiame, with whom she is the mother of Daramulum.
Gamilaraay, Yuwaalaraay & Yuuwaalayaay Dictionary, Alice Springs: IAD Press, 2003.