The Vishnu Purana narrates that Rudra - here identified with Shiva - was born from the anger of the creator-god Brahma. The furious Rudra was in Ardhanari form, half his body was male and other half female. He divided himself into two: the male and female. The male form then split itself into eleven, forming the eleven Rudras. Some of them were white and gentle; while others were dark and fierce. They are called: