Srimad Bhagavatam Canto 05, Chapter 20, Text 31

SB 5.20.31

tad-dvipasyapy adhipatih praiyavrato vitihotro namaitasyatmajau ramanaka-dhataki-namanau varsa-pati niyujya sa svayam purvajavad-bhagavat-karma-sila evaste.
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The ruler of this island, the son of Maharaja Priyavrata named Vitihotra, had two sons named Ramanaka and Dhataki. He granted the two sides of the island to these two sons and then personally engaged himself in activities for the sake of the Supreme Personality of Godhead like his elder brother Medhatithi.
Srimad Bhagavatam Canto 05, Chapter 20, Text 30
Srimad Bhagavatam Canto 05, Chapter 20, Text 32