Narmer, Aha, Djer, Djet and Den are not "Egyptian" names. It's a linguistic free-for-all. You can rule out Mesopotamia. Some have suggested Harappa/Indus Valley as the origin. There is the strange thing with the pharaohs when represented in paintings having a reddish tint for their skin tone, as opposed to those depictions of peoples who were obviously white or black.
If you go to the British Museum and read the letters by Dr Birch, in his first letter for the markings found in the 2nd chamber (Wellington's Chamber), he identifies the pharaoh (Suphis) as one who ruled about 200 years after Khufu. In his second later he identifies the markings found in the 3rd chamber (Campbell's Chamber) as Pharaoh Raufu.
If you read Dawn of Civilization by Gaston Maspero he refers to it as the greatest embarrassment in Egyptology, the fact that no one has been able to reconcile the two very different names in the Great Pyramid.
Anyway, Sneferu's use of white-washed mud-bricks around his pyramid suggests he was attempting to copy the Great Pyramid, which used to be encased in white Tura limestone. I think it was the Journal of the Society of Light and Optics which did a study showing that the albedo (reflectivity) of polished white Tura limestone would produce so many foot-candles of energy (light) so that on the New/Full Moon it would have lit up the entire plateau, been visible from the horizon, and the glow of the Great Pyramid could be seen from as far as 90 miles away (sort of how you see the glow of distant cities at night while driving down the interstate).
If Sneferu was attempting to copy the Great Pyramid, then it already existed in his time, so Khufu couldn't have built it.