"In some Hindu traditions, Manu is a title accorded to a progenitor of humanity. According to these traditions, the current time period is ruled by the seventh Manu called the Vaivasvata Manu, the son of Vivasvân and his wife Sanjnâ.
Vaivasvata Manu, whose original name was Satyavrata, is the 7th Manu and considered the first king to rule this earth, who saved humanity from the great flood — after being warned of it by the Matsya avatar of Vishnu, who had also advised him to build a giant boat. The story is mentioned in early Hindu scriptures such as the Satapatha Brahmana, and it has often been compared with the popular traditions of aGreat Deluge from other cultures around the world, particularly that of Noah's Ark. Because Manu was believed to be absolutely honest, he was initially known as Satyavrata ("One with the oath of truth"). Vaivasvata Manu ruled as King Manu. His wife was Sraddha.
The Mahabharata says:
- "And Manu was endowed with great wisdom and devoted to virtue. And he became the progenitor of a line. And in Manu's race have been born all human beings, who have, therefore, been called Manavas. And it is of Manu that all men including Brahmanas, Kshattriyas, and others have been descended, and are therefore all called Manavas. Subsequently, O monarch, the Brahmanas became united with the Kshattriyas. And those sons Manu that of were Brahmanas devoted themselves to the study of the Vedas. And Manu begat ten other children named Vena, Dhrishnu, Narishyan, Nabhaga, Ikshakus, Karusha, Saryati, the eighth, a daughter named Ila, Prishadhru the ninth, and Nabhagarishta, the tenth. They all betook themselves to the practices of Kshattriyas. Besides these, Manu had fifty other sons on Earth. But we heard that they all perished, quarrelling with one another."wikipedia