Srimad Bhagavatam Canto 04, Chapter 01, Text 35

 SB 4.1.35

tat-putrav aparav astam
khyatau svarocise ’ntare
utathyo bhagavan saksad
brahmisthas ca brhaspatih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Besides these four daughters, she also had another two sons. One of them was known as Utathya, and the other was the learned scholar Brhaspati.
Srimad Bhagavatam Canto 04, Chapter 01, Text 34
Srimad Bhagavatam Canto 04, Chapter 01, Text 36