Puru
Srimad-Bhagavatam
SB Canto 1
SB 1.12.16, Purport:
The child Parīkṣit was saved by the all-powerful and all-pervasive Viṣṇu (Lord Kṛṣṇa) for two reasons. The first reason is that the child in the womb of his mother was spotless due to his being a pure devotee of the Lord. The second reason is that the child was the only surviving male descendant of Puru, the pious forefather of the virtuous King Yudhiṣṭhira. The Lord wants to continue the line of pious kings to rule over the earth as His representatives for the actual progress of a peaceful and prosperous life.