Prithu
According to Hindu mythology, Prithu (Sanskrit: पृथु, Pṛthu, lit. "large, great, important, abundant") is a sovereign (chakravartin), named in the Vedic scriptures and considered an Avatar (incarnation) of the preserver god—Vishnu. He is also called Pruthu, Prithi and Prithu Vainya, literally, Prithu — the son of Vena. Prithu is "celebrated as the first consecrated king, from whom the earth received her (Sanskrit) name Prithvi." He is mainly associated with the legend of his chasing the earth goddess, Prithvi, who fled in the form of a cow and eventually agreed to yield her milk as the world's grain and vegetation. The epic Mahabharata and text Vishnu Purana describes him as a part Avatar (incarnation) of Vishnu.
Legends
The birth of Prithu is without female intervention. Thus being a ayonija ("born without (the participation) of the yoni"), Prithu is untouched by desire and ego and can thus control his senses to rule dutifully upholding Dharma.
The Mahabharata traces Prithu's lineage from Vishnu.The Almighty Vishnu created a human named Virajas to rule the earth and bring order to the Humans. Virajas lost his desire to rule the earth after beholding Vishnu and became an ascetic. Virajas' son was Krittimat, who became an ascetic. Krittimat's son was Kardama. Kardama's son was Ananga and Ananga's son was Atibala. Atibala, also called Anga, conquered the earth and ruled well. Atibala married Mrityu's daughter, Sunita and had a son named Vena. Vena's son would be Prithu.