How many people's DNA were involved in the compilation of the reference human genome?

Question

I know that the reference human genome is complied from DNA portions from different people, most of whom were European. Do you know how many of them were involved? Do you know which ones were involved? Perhaps scientists like James Watson and George Church's DNA were in the reference genome. Also, I would assume that the NIH funded Human Genome Project's reference genome must be slightly different from the privately funded one.

Answer 1

tl;dr: In the Human Genome Project, they used the DNA of four people (though one male provided >70% of DNA. The Celera genome was compiled from five people.

In the [...] Human Genome Project (HGP), [...] scientists used white blood cells from the blood of two male and two female donors (randomly selected from 20 of each) -- each donor yielding a separate DNA library. One of these libraries (RP11 [anonymous donor from Buffalo, NY]) was used considerably more than others, due to quality considerations.

[...]

In the Celera Genomics private-sector project, DNA from five different individuals were used for sequencing. The lead scientist of Celera Genomics at that time, Craig Venter, later acknowledged (in a public letter to the journal Science) that his DNA was one of 21 samples in the pool, five of which were selected for use.

On September 4, 2007, a team led by Craig Venter published his complete DNA sequence,[21] unveiling the six-billion-nucleotide genome of a single individual for the first time.)

Source: Wikipedia