Utathya was the second son of Maharṣi (Maharshi; Great Sage) Aṅgirā (Angira) the elder brother of Vṛhaspati, the guru of gods, and a famous Vedic sage. According to Purāṇa (Purana), he was one of the sons born of the womb of Svarāṭ (Swarat), sired by Maharṣi Aṅgirā. He was the half-brother of Vṛhaspati (Vrihaspati).
According to some Purāṇa (Purana), Mamatā was the wife of sage Uthathya. When she was pregnant, one day during the absence of Utathya, Vṛhaspati attempted to have a conjugal relationship with her. The child inside the womb restricted him. So cursed by Vṛhaspati, this son of Utathya remained without eyesight for a long time. This blind son of Utathya was called Dīrghatamā (Dirghatama). This legend of Māmateya (Mmateya) Dīrghatamā (Dirghatama) has been attributed to other sons of Aṅgirā — Uśija, Asija and others. However, we consider that Uthathya , Uśija(Usija) and Asija were the same person. And Mamatā is mostly known as Utathya’s wife.

In Anuśāsanaparva(Anusasanaparva) of Mahābhārata (Mahabharata), there is a legend about Maharṣi Utathya. Candra (Chandra) nominated Utathya as the husband of his daughter Bhadrā (Bhadra). To get Utathya as her husband, Bhadrā started performing a great tapasyā (tapasya; penance). Candra’s father, Maharṣi Atri called Utathya and got him married to his granddaughter. God Varuṇa was secretly attracted towards Bhadrā. Utathya sent Devarṣi (Devarshi; Divine sage) Nārada (Narada) as messenger to Varuṇa, and asked him to return his wife Bhadrā. But Varuṇa did not pay heed to his words. Being furious, Utathya used his ascetic power to soak all waters from the face of the earth. It is said that the river Sarasvatī got dried up by the flame of Utathya’s wrath. Afraid of Uthathya’s ascetic power, Varuṇa finally returned Bhadrā.