Hello Ben, I found in a book that Charles Darwin is relative to William Darwin the one who was born 1700 and all is decendents. I can't make to tie together, but I think you would like to know that other Darwin from Charles Darwin family came to the United States. Did you that there is a book on Charles Darwin family. The book is called Darwin Pedigrees by R.B. Freeman. You maybe able to find it at your Local Public Library. Another book is Emma Darwin, a century of family letters by Henriett Litchfield and you maybe able to find it at the Library too. If you want I can give what I got on my disk for what you got. Thomas Cooke.