Srimad Bhagavatam Canto 05, Chapter 01, Text 28

SB 5.1.28

anyasyam api jayayam trayah putra asann uttamas tamaso raivata iti manvantaradhipatayah.
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
In his other wife, Maharaja Priyavrata begot three sons, named Uttama, Tamasa and Raivata. All of them later took charge of manvantara millenniums.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
In every day of Brahma there are fourteen manvantaras. The duration of one manvantara, the life span of one Manu, is seventy-one yugas, and each yuga is 4,320,000 years. Almost all the Manus selected to rule the manvantaras came from the family of Maharaja Priyavrata. Three of them are particularly mentioned herein, namely Uttama, Tamasa and Raivata.
Srimad Bhagavatam Canto 05, Chapter 01, Text 27
Srimad Bhagavatam Canto 05, Chapter 01, Text 29