They are the sages Marichi, Atri, Pulastya, Pulaha, Kratu, Vashishtha, Angiras, and the mighty and powerful lord Rudra, and Prachetas. The last beget Daksha, who in his turn beget sixty daughters. All those daughters were accepted by the twice-born sages for the purpose of begetting children upon them.
मरीचिमृषिमत्रिं च पुलस्त्यं पुलहं ऋतुम्। वसिष्ठाङ्गिरसौ चोभौ रुद्रं च प्रभुमीश्वरम्॥ प्राचेतसस्तथा दक्षः कन्याषष्टिमजीजनत्। ता वै ब्रह्मर्षयः सर्वाः प्रजार्थं प्रतिपेदिरे॥