Srimad Bhagavatam Canto 09, Chapter 01, Text 41

SB 9.1.41

tasyotkalo gayo rajan
 vimalas ca trayah sutah
daksina-patha-rajano
 babhuvur dharma-vatsalah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O King, Sudyumna had three very pious sons, named Utkala, Gaya and Vimala, who became the kings of the Daksina-patha.
Srimad Bhagavatam Canto 09, Chapter 01, Text 40
Srimad Bhagavatam Canto 09, Chapter 01, Text 42