Vishvamitra
Brahmarshi Vishvamitra (viśvā-mitra) is one of the most venerated rishis or sages of ancient times in India. He is also credited as the author of most of Mandala 3 of the Rigveda, including the Gayatri Mantra. The Puranas mention that only 24 rishis since antiquity have understood the whole meaning of—and thus wielded the whole power of—the Gayatri Mantra. Vishvamitra is supposed to be the first, and Yajnavalkya the last.
The story of Vishvamitra is narrated in the Balakanda of Valmiki Ramayana. The Mahabharata adds that Vishvamitra's relationship with Menaka resulted in a daughter, Shakuntala, whose story is narrated in the Adi Parva of the Mahabharata.
Vishvamitra was a king in ancient India, also called Kaushika ("descendant of Kusha"). Vishwamitra was originally the Chandravanshi King of Kanyakubja. He was a valiant warrior and the great-grandson of a great king named Kusha. The Valmiki Ramayana, prose 51 of Bala Kanda, starts with the story of Vishvamitra:
His story also appears in various Puranas; however, with variations from the Ramayana. The Vishnu Purana and Harivamsha chapter 27 (dynasty of Amaavasu) of Mahabharatha narrates the birth of Vishvamitra. According to Vishnu Purana, Kushanabha married a damsel of the Purukutsa dynasty (later called as Shatamarshana lineage - descendents of the Ikshvaku king Trasadasyu) and had a son by name Gaadhi, who had a daughter named Satyavati (not to be confused with the Satyavati of Mahabharata).
