Swayambhuva Manvantara was the first manvantara, named after Swayambhuva Manu. Yamya was the prominent deity of this manvantara. Marichi and other six prominent sages were the Saptarishis of this manvantara.
Swayambhuva Manu had ten sons – Aghnigha, Agnibahu, Vibhu, Savan, Jyotishman, Dyutiman, Havya, Medha, Medhatithi and Vasu.
Each manvantara is ruled over by a Manu. In the present kalpa, six manvantaras have already passed and the names of the six Manus who ruled were Svayambhuva, Svarochisha, Uttama, Tamasa, Raivata and Chakshusha. The name of the seventh Manu, who rules over the seventh manvantara of the present kalpa, is Vaivasvata.
The titles of the seven great sages (saptarshi) as well as the tile of Indra change from manvantara to manvantara. The gods also change.