SB 5.20.9
tad-dvipadhipatih priyavratatmajo yajñabahuh sva-sutebhyah saptabhyas tan-namani sapta-varsani vyabhajat surocanam saumanasyam ramanakam deva-varsam paribhadram apyayanam avijñatam iti.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The son of Maharaja Priyavrata named Yajñabahu, the master of Salmalidvipa, divided the island into seven tracts of land, which he gave to his seven sons. The names of those divisions, which correspond to the names of the sons, are Surocana, Saumanasya, Ramanaka, Deva-varsa, Paribhadra, Apyayana and Avijñata.