Wikipedia
Maharishi Bhrigu was one of the seven great sages, the Saptarshis, one of the many Prajapatis (the facilitators of Creation) created by Brahma (The God of Creation), the first compiler of predictive astrology, and also the author of Bhrigu Samhita, the astrological ( Jyotish) classic. Bhrigu is considered as a Manasa Putra (mind-born-son) of Brahma. The adjectival form of the name, Bhargava, is used to refer to the descendants and the school of Bhrigu.
According to Manusmriti, Bhrigu was a compatriot of and lived during the time of Manu, the Hindu progenitor of humanity. Bhrigu had his Ashram (Hermitage) on the Vadhusar River, a tributary of the Drishadwati River near Dhosi Hill in the Vedic state of Brahmavarta, presently on the border of Haryana and Rajasthan in India Along with Manu, Bhrigu had made important contributions to ' Manusmriti', which was constituted out of a sermon to a congregation of saints in the state of Brahmavarta, after the great floods in this area, nearly 10,000 years ago. As per Skanda Purana Bhrigu migrated to Bhrigukutch, modern Bharuch on the banks of Narmada river in Gujarat, leaving his son Chyavana at Dhosi Hill.
He was married to Khyati, the daughter of Daksha. He had two sons by her, named Dhata and Vidhata. His daughter Bhargavi, married Vishnu ( Narayana).
He has one more son through Kavyamata (Usana), who is better known than Bhrigu himself – Shukra, learned sage and guru of the asuras. The sage Chyavana is also said to be his son through Puloma. [Maha:1.5] One of his descendants was sage Jamadagni, who in turn was the father of sage Parshurama, considered an avatar of Vishnu.