One of my 3rd great grandmothers was the daughter of double fist cousins.
That is both of her parents were sons and daughters of brothers and sister.
Brother George and William married sisters Mary and Elizabeth, their children John and Karenhappuck married and my 3rd great grandmother was their child.
This is some web to unweave. Only on the frontier and amongst royalty.
Although she had four grandparents, she only had 4 great grandparents and 8 great great grandparents. (my 10th Generation counting me as gen 1)
My quesion is this: How do I unravel this line?
In this line my genealogical 4th great grandparents are my genetic 4th great grandparents, but what is the genetic relationship from me to my genealogical 5th great grandparents, given that I am dealing with not one but two collapsed pedigrees.?
Am I stating the situation correctly?
PS My grandmother, told me back in the 1950's that her great great grandparents were double first cousins. It took another 40 years of research to prise out and prove that fact.