The son of Yuvanāśva was Śrāvasta, who constructed a township known as Śrāvastī Purī. The son of Śrāvasta was Bṛhadaśva, and his son was Kuvalayāśva. In this way the dynasty increased.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
श्रावस्तस्तत्सुतो येन श्रावस्ती निर्ममे पुरी । बृहदश्वस्तु श्रावस्तिस्ततः कुवलयाश्वकः
śrāvastastatsuto yena śrāvastī nirmame purī | bṛhadaśvastu śrāvastistataḥ kuvalayāśvakaḥ
SB 9.6.21