Amṛtapā (Amritapa) is a Dānava (Danava; Demon) born of the womb of Danu, and sired by Kaśyapa (Kasyapa) Prajāpati (Prajapati; Ruler of the people).

Mahābhārata (Kinjawadekar)(1.65.29)
Mahābhārata Vols. 1-43 (Siddhāntabāgīśa)(1.60.29)