Pingaksha, Sumukha, Vibodha, Suputra. In the Markandeya Purana they answer the questions of Jaimini, a disciple of Vyasa.
Her mother, Tarkashi, had her stomach slit open by an arrow while she was flying over the battlefield of the Mahabharata War. Four eggs fell down, an elephant’s bell came off and fell protectively over the birds. They were found and raised by a sage. When they grew up they studied the Veda.
Read Markandeya Purana here