Chakravaka (चक्रवाक) is name of a River mentioned by Panini in Ashtadhyayi under Ajirādi (अजिरादि) (6.3.119) group.  It is also mentioned in Mahabharata.
Adi Parva, Mahabharata/Book I Chapter 60 mentions genealogy of all the principal creatures. Chakravaka (चक्रवाक) is mentioned in verse (I.60.56). 
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