When the principles of breeding and of inheritance are better understood, we shall not hear ignorant members of our legislature rejecting with scorn a plan for ascertaining by an easy method whether or not consanguineous marriages are injurious to man.
~ Charles Darwin
(The Descent of Man: And Selection in Relation to Sex)
Two parents… four grandparents… eight great-grandparents…
If the number of ancestors is doubled in each generation as we go back in time, logic suggests there will be about a thousand ancestors per person in ten generations, and about a million of them in twenty generations. But as we go back in time fewer people were on earth than there are now.
However, one does not usually have to go too far back in his or her family history to find cousins marrying cousins of one degree or another. This actually collapses the pedigree, because when cousins have children together, some of the children’s ancestors are repeated in another line. This can make for a non-branching family tree with very tangled roots! The more cousins having children together on one’s pedigree, the more lines of ancestors will be repeated, and the actual number of one’s ancestors will eventually be fewer and fewer…
Following are the cousin marriages I have found so far on our trees. I will continue to update this page when I discover new connections.
Tim & I are 10th cousins, twice removed. Tim’s 11th-great-grandparents and my 9th-great-grandparents were  Nathaniel Bacon and  Hannah Mayo.
Tim’s great-grandfather,  George Lincoln Rodgers married his first cousin,  Mary Jane Rodgers, Tim’s great-grandmother. George & Mary’s fathers were brothers, and their grandparents in common were  Jacob Rogers and  Mahala Bedford.
My 2nd-great-grandfather,  William Martin White married his first cousin,  Ellen C. Hill, my 2nd-great-grandmother. William’s father and Ellen’s mother were siblings, and their grandparents in common were  Oliver White and  Lydia (—).
My 2nd-great-grandfather,  Reuel Gardner Atwood married his half second cousin, once removed,  Louisa Jane Atwood, my 2nd-great-grandmother. Reuel & Louisa’s common ancestor was  Lt. Nathaniel Atwood.
My 3rd-great-grandfather,  Reuel Atwood married his sixth cousin,  Abigail Savery Tillson, my 3rd-great-grandmother. Reuel & Abigail’s common 5th-great-grandparents were  John Howland and  Elizabeth Tilley.
My 3rd-great-grandfather,  Ebenezer Atwood married his second cousin, twice removed,  Waitstill Lucas, my 3rd-great-grandmother. Ebenezer & Waitstill’s common ancestors were  Dea. Nathaniel Atwood and  Mary (—).
My 3rd-great-grandfather,  Warren Freeman married his double fourth cousin,  Elisabeth Weekes, my 3rd-great-grandmother. Warren & Elisabeth’s common 3rd-great-grandparents were  Joshua Hopkins and  Mary Cole; and also  Edward Small and  Mary Woodman.
My 4th-great-grandfather,  Nathaniel Atwood married his first cousin,  Zilpha Shurtleff, my 4th-great-grandmother. Nathaniel & Zilpha’s mothers were sisters, and their grandparents in common were  Nathaniel Shaw and  Hannah Perkins.
Tim’s 5th-great-grandfather,  Asher Huntley married his first cousin,  Betsey Wilder Tiffany, Tim’s 5th-great-grandmother. Asher’s mother & Betsey’s father were siblings, and their grandparents in common were  Consider Tiffany and  Naomi Comstock.
My 5th-great-grandfather,  Ichabod Atwood married his first cousin, once removed,  Hannah Shaw, my 5th great-grandmother. Ichabod & Hannah’s common ancestors were  Dea. Nathaniel Atwood and  Mary (—).
My 5th-great-grandfather,  William Shurtleff married his first cousin, once removed,  Ruth Shaw, my 5th-great-grandmother. William & Ruth’s common ancestors were  Abiel Shurtleff and  Lydia Barnes.
My 5th-great-grandfather,  John Freeman married his second cousin,  Abigail Hopkins, my 5th-great-grandmother. John & Abigail’s common great-grandparents were  Richard Sparrow and  Mercy Cobb.
My 7th-great-grandfather,  Edmund Freeman married his second cousin,  Sarah Sparrow, my 7th-great-grandmother. Edmund & Sarah’s common great-grandparents were  Thomas Prence and  Patience Brewster.
Last Revised: 15 November 2017