Matsyapurana 48.20

48.20

teṣāṃ janapadāḥ sphītāḥ kekayā bhadrakāstathā
sauvīrāścaiva paurāśca nṛgasya kekayāstathā //

Śibi begot four famous sons, viz., Prithudarbha, Sutîsa, Kekaya, and Bhadraka; and their countries were named after them, viz., Kekayâ, Bhadrakâ, Sanvîrâ, and Paurâ, and the country of king Nṛigu was also known as Kekayâ.—19.

Ambaṣṭha was the name of the capital town of Suvrata's country, and Vṛiṣalâ was the capital of Kṛiśa, and Navarâṣṭra was the capital of Nava. Now listen to the family of Titikṣu.—20-21.