Бхагавата-пурана
As per Bhagavata Purana, Lord Brahma gave Rudra eleven other names, Manyu, Manu, Mahinasa, Mahān, Śiva, Rtadhvaja, Ugraretā, Bhava, Kāla, Vāmadeva and Dhrtavrata. Many names from the Bhagavata Purana appear in the Astamurti ascription.