What is "wuluwaid"

In Australian Aboriginal mythology, Wuluwaid (see also Wuluwait) is a rain god. He is a god from northern Arnhem Land (northern Australia) and is known to work with Bunbulama as a rainmaker. He is also recorded by Charles Mountford and Ainslie Roberts as a boatman who ferries the souls of the dead to Purelko, the aboriginal afterlife.