Shiva Purana
हर्षकेतुस्सुकेतुश्च तथा धर्मरथोपरः॥ शूरः पंचजनश्चैव तस्य वंशकरा नृपाः॥ ५४॥
The four who were spared were Harṣaketu, Suketu, Dharmaratha and Pañcajana. They became the kings establishing his line.
english translation
harSaketussuketuzca tathA dharmarathoparaH॥ zUraH paMcajanazcaiva tasya vaMzakarA nRpAH॥ 54॥
hk transliteration by Sanscript