SB 9.6.1
sri-suka uvaca
virupah ketumañ chambhur
ambarisa-sutas trayah
virupat prsadasvo ’bhut
tat-putras tu rathitarah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Sukadeva Gosvami said: O Maharaja Pariksit, Ambarisa had three sons, named Virupa, Ketuman and Sambhu. From Virupa came a son named Prsadasva, and from Prsadasva came a son named Rathitara.