SB 9.23.14

vṛṣasenaḥ sutas tasya
 karṇasya jagatīpate
druhyoś ca tanayo babhruḥ
 setus tasyātmajas tataḥ
Synonyms: 
vṛṣasenaḥ — Vṛṣasena; sutaḥ — a son; tasya karṇasya — of that same Karṇa; jagatī pate — O Mahārāja Parīkṣit; druhyoḥ ca — of Druhyu, the third son of Yayāti; tanayaḥ — a son; babhruḥ — Babhru; setuḥ — Setu; tasya — of him (Babhru); ātmajaḥ tataḥ — a son thereafter.
Translation: 
O King, the only son of Karṇa was Vṛṣasena. Druhyu, the third son of Yayāti, had a son named Babhru, and the son of Babhru was known as Setu.