SB 9.23.34
tat-suto rucakas tasya
pañcasann atmajah srnu
purujid-rukma-rukmesu-
prthu-jyamagha-samjñitah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The son of Usana was Rucaka, who had five sons — Purujit, Rukma, Rukmesu, Prthu and Jyamagha. Please hear of these sons from me.