In the works of Vyasa, the story of Uttanka in the start of the Paushya Parva. The work of Vyasa is much more detailed than what Kashidas shared. As stated in the start of the post on Aruni, King Paushya is missing from the work of Kashidas.
The Guru of Upamanyu and Aruni also had a disciple called Veda. Veda, when he was older, also became a teacher, like his guru before him. He had students come and stay with him and learn. One such student was a person called Uttanka, who lived in his guru’s household. This tale is about Uttanka.
Uttanka, Janamejaya and Paushya shared the same guru, Veda.