As per Viṣṇupurāṇa (Vishnupurana), Udāyu (Udayu) is one of the six sons of Devakī (Devaki). These six sons were killed by Kaṁśa (Kamsa). In the Bengal recension of Viṣṇupurāṇa, however, the name is given as Udāpi(Udapi)  instead of Udāyu.