Mbh 3.200.1

Vaisampayana said, “Having, O great king, heard from the illustrious Markandeya the history of the attainment of heaven by the royal sage Indradyumna, Yudhishthira, that bull of the Bharata race, once more asked that sinless Muni endued with great ascetic merit and long life, saying, ‘Thou knowest, O virtuous one, the entire host of the gods, the Danavas, and the Rakshasas. Thou art acquainted also with various royal genealogies and many eternal lines of Rishis! O best of Brahmanas, there is nothing in this world that thou dost not know! Thou knowest also, O Muni, many delightful stories about men, Snakes and Rakshasas; about gods, Gandharvas, and Yakshas, and about Kinnaras and Apsaras! I desire now to hear from thee, O best of Brahmanas, as to why Kuvalaswa--that unvanquished king of Ikshavaku’s race changed his name, assuming another, viz., Dhundhumara. O thou best of Bhrigu’s line, I desire to know in detail why the name of Kuvalaswa of great intelligence underwent such a change!’”