Janamejaya
जनमेजय
Janamejaya, eldest son of Parikshit and Iravati and emperor of the Kuru line, is named first among the four sons at SB 1.16.2. To avenge his father's death by Takshaka he held the famous snake sacrifice, halted at the plea of the sage Astika. It was at that sacrifice that Vaishampayana recited the Mahabharata to him — so that the transmission of both the Mahabharata and the Bhagavata runs through this same line of descent. Vaishampayana is already an entity in this corpus.
Śrīmad Bhāgavata Mahāpurāṇa 1.16.2 — Sanskrit Wikisource (pinned oldid=148532)
Janamejaya is the son of Maharaja Parikshit. Source evidence (SB 1.16.2): Janamejaya is Parikshit's son: 'janamejayadims caturas tasyam utpadayat sutan' (SB 1.16.2), the first of four sons born of Iravati. Direction: son -> father. Evidence: EXPLICIT.
Son Iravati HumanJanamejaya is the son of Iravati. Source evidence (SB 1.16.2): Janamejaya is Iravati's son: 'tasyam' (SB 1.16.2), the four sons being begotten on her. Direction: son -> mother. Evidence: EXPLICIT.