Ruru begot a son upon his wife Pramadvara. That son was the regenerate Rishi Shunaka. Shunaka begot a son who is named Shaunaka.
प्रमद्वरायां तु रुरोः पुत्रः समुदपद्यत। शुनको नाम विप्रर्षिर्यस्य पुत्रोऽथ शौनकः॥