Pyramid of Djoser 1

The First Pyramid was built 2700 BC.
Why did they build the Djoser Pyramid?
Why did they stop referring to this Pharoah as Netjerikhet and changed his name to ‘Djoser’ 1200 years after he lived? (not covered in the video I just ‘gotsa know’)
Is there an Ancient Breton ‘French Connection’?
Add in some Plato and Atlantis hunting as well.

Wonderful Barnenez Video Link-
youtube.com/watch?v=xR_AusYrRPw
Thanks to Urbex Fred 57.