80 generations?
Good golly. As a genealogist - well, just taking my own family tree back to the Mayflower (same time period) - many of whom were my 7th and 8th great great parents - that would make 10-11 generations.
Not to mention, if every generation were only 20 years - in 400 years, that is only 20 generations, not 80. 80 x's 20 would be 1,600 years.
*cough* Knew I shouldn’t attempt math before morning coffee. I stand corrected.