How many people could have written the Voynich?

[Mark Knowles]

It can be assumed that about 90 percent of the population in the Middle Ages belonged to the lower class of working peasants. The rest was distributed among the clergy and nobility. The growing cities took a special position (quote: "City air makes you free".) Citizens could, depending on their profession, develop relatively freely and their share of the population grew steadily. Statistically, they are counted among the third class.
If the population in Europe in 1400 was 78 million, then the share of the clergy and nobility in Europe was about 7.8 million people. However, it may be necessary to distinguish between the author of the manuscript and the donor. It can be assumed that the VMS was quite expensive to produce and that a member of the lower clergy, for example, could not afford it. Nevertheless, he could practically be able to write the manuscript. The number of those who could finance the VMS is therefore much smaller than the number of potential authors. The assumption that it could be about 2 percent of the population I consider realistic.

The author would have be reasonably intellectual. I am not talking about Voynich specific knowledge, that is something else, just someone with enough intelligence that they might consider such an undertaking. What percentage of our group might fit that?

Also I wonder what percentage of our collection of individuals would have enough in the way of surviving records that we could find their name today. Ideally what percentage of those individuals might turn up somewhere on a Google search even if only the smallest of mention.