Whence redheads?

Are all (natural) redheads descended from Irish and/or Scotish cave people?
Peace,
mangeorge
BTW, I did search here. The SDMB runneth over with redhead stuff, and I tire.

I won’t judge but Wikipedia does have a good article on the origins of red hair including the cause and worldwide distribution. Red hair isn’t exclusive to Ireland or Scotland by any means.

Thanks for the interesting link. Shagnasty. It led me to this;
http://genome.wellcome.ac.uk/doc_WTD020874.html.
I quote;

Makes sense.