SB 9.23.23
durmado bhadrasenasya
dhanakah krtaviryasuh
krtagnih krtavarma ca
krtauja dhanakatmajah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The sons of Bhadrasena were known as Durmada and Dhanaka. Dhanaka was the father of Krtavirya and also of Krtagni, Krtavarma and Krtauja.