Shiva Purana
युवनाश्वस्सुतस्तस्य कुवलाश्वश्च तत्सुतः ॥ स हि धुंधुवधाद्भूतो धुंधुमारो नृपोत्तमः॥ ९॥
His son was Yuvanāśva and Kuvalāśva was his son. Since he slew Dhundhu he became the excellent king Dhundhumāra.
english translation
yuvanAzvassutastasya kuvalAzvazca tatsutaH ॥ sa hi dhuMdhuvadhAdbhUto dhuMdhumAro nRpottamaH॥ 9॥
hk transliteration by Sanscript