According to Bhāgavatapurāṇa (Bhagavatapurana), Jaya was the youngest of the sons born of the womb of Urvaśi (Urvasi) , and sired by Pururavā(Pururava). Amita was the son of this Jaya.

Bhāgavatpurāṇa Vols. 1-12(9.15.2)