Svāyambhuva Manu’s two sons, Priyavrata and Uttānapāda, became very powerful kings, and their sons and grandsons spread all over the three worlds during that period.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
प्रियव्रतोत्तानपादौ मनुपुत्रौ महौजसौ । तत्पुत्रपौत्रनप्तॄणामनुवृत्तं तदन्तरम्
priyavratottānapādau manuputrau mahaujasau | tatputrapautranaptṝṇāmanuvṛttaṃ tadantaram
SB 4.1.9