Sarūpā, the wife of Bhūta, gave birth to the ten million Rudras, of whom the eleven principle Rudras were Raivata, Aja, Bhava, Bhīma, Vāma, Ugra, Vṛṣākapi, Ajaikapāt, Ahirbradhna, Bahurūpa and Mahān. Their associates, the ghosts and goblins, who are very fearful, were born of the other wife of Bhūta.