A listing of ancestors who are reported to have been part of the Puritan Great Migration (PGM) from England to what became known as New England (1620-1640).
The number of these, about 100, is much larger than I had imagined when beginning to fill out "PGM Descendant" boxes. Going back that number of generations, however, they represent something on the order of one-tenth of my ancestors from that age.
Mathematically, at 10 generations back, one has 1024 eighth-great-grandparents. However one may be descended from any one of them in more than one way over a few centuries - meaning some would be counted more than once. So the actual percentage of my ancestors in the PGM is likely somewhat higher.
Their descendants (plus some later arrivals from England) were in New England for about two centuries before some began moving out in the 1800s. Other ancestors came from England, Ireland, and Scotland via Canada, and after a generation or two, to the US. (These were separate lines; plus there are other Canadian connections.) Plus later immigrants to the US from Ireland and the then states of Germany.