A prominent nāga (naga; serpent) sired by Kaśyapa Prajāpati (Kasyapa Prajapati) to Kadrū (Kadru), daughter of Dakṣa (Daksha). 

Mahābhārata (Kinjawadekar)(1.35.7)
Mahābhārata (Droṇaparva-Svargārohaṇaparva)(1.30.7)