It is well-known in the world that the sons of Angiras were three, namely Brihaspati, Utathya and Samvarta, all of great asceticism.
त्रयस्त्वङ्गिरसः पुत्रा लोके सर्वत्र विश्रुताः। बृहस्पतिरुतथ्यश्च संवर्तश्च धृतव्रताः॥