These goddesses have occurred together in ancient Sanskrit literature, Srimad Bhagvatam or Bhagavata Purana (Gita Press has a two-volume English and Hindi translation) and are frequently worshipped together in the Kumaon and Garhwal as well as elsewhere in India. Regarding certain mountains as sacred and associating them with specific Gods and Goddesses is a practice prevalent in other parts of Asia as well e.g. the volcanic Mount Fuji in Japan appears to have been named after the fire goddess. The first published reference to Nanda Devi East as Sunanda Devi appears to be in a recent novel (Malhotra 2011) that has the Kumaon region as backdrop.