•Kashyap,
•Atri,
•Vashisht,
•Vishwamitra,
•Gautam,
•Jamadagni and,
•Bhardwaj
According to the Puranas, there are 14 Manvantaras, out of which 6 Manvantaras have passed...

•30 kastha = 1 kala
•30 Kala = 1 Muhurta
•30 Muhurta = 1 Ahoratra (one day and night)
•15 Ahoratra = 2 Paksha (Shukla Paksha, Krishna Paksha)
•2 Paksha= 1 month
•6 months = 1 Ayan
•2 Ayan = 1 year
One year = One day and night of
In 12 thousand years of the deities, there are four yugas namely Satyuga, Tretayuga, Dwaparayuga and Kaliyuga. In which, there are 17,28,000 in Satyuga, 12,96,000 in Tretayuga, 8,64,000 in Dwaparayuga and 4,32,000 years in Kaliyuga.
• 14 Manvantaras =1 Kalpa (one day of Brahma) and the same period of time is his (Brahma)night which is called "Pralaykal."
And 30,67,20,000 human= 1Manvantara And 14 times of this period is =1 kalpa(a day of Brahma), immediately after which comes Brahma Pralay named Nimittik. At that time all three Lokas(Bhuloka,Bhuvalok &Swaloka)
