vrsasenah sutas tasya
druhyos ca tanayo babhruh
setus tasyatmajas tatah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O King, the only son of Karna was Vrsasena. Druhyu, the third son of Yayati, had a son named Babhru, and the son of Babhru was known as Setu.