Sarga - Primary Creation Visarga - Secondary Creation

https://www.google.com/search?q=On+the+origin+of+Prak%E1%B9%9Bti+and+Puru%E1%B9%A3a

https://www.google.com/search?q=On+the+origin+of+Brahm%C4%81%2C+Vi%E1%B9%A3%E1%B9%87u%2C+Mahe%C5%9Ba+and+others