Puranic Encyclopaedia: A Comprehensive Dictionary with Special Reference to the Epic and Puranic Literature c7.1609

c7.1609

Thus, according to the Rāmāyaṇa Kadrū was the daughter of Kaśyapa born of his wife Krodhavaśā. Again Vinatā who is spoken of as the elder sister of Kadrū in Mahābhārata is the daughter of the granddaughter of Kaśyapa. This means that Kadrū's mother and Vinatā's grand mother's mother were sisters. But both of them looked after Kaśyapa as if they were direct sisters.