Markandeyapurana 53.26

53.26

dhṛtimat prākarañcaiva kāpilaṃ cāpi saptamam /
vapuṣmataḥ sutāḥ sapta śālmaleśasya cābhavan //

In Kuśadvīpa itself also there were seven countries called by the names of the sons of Jyotiṣmat; hear their names from me—Udbhida, and Vaiṇava, Suratha, and Lambana, Dhṛtimat, and Prākara, and Kāpila the seventh.

And Vapuṣmat the lord of Śālmali had seven sons, both Śveta, and Harita, Jīmūta, and Rohita, Vaidyuta, and Mānasa, and Ketumat the seventh. And they had seven countries in Śālmali, which bore the same names.