Wooow, Maria, this is incredible!!!
It is a very interesting story and quite uncommon, as we don't even think about our DNA. Well, maybe many people are worried about it, but in general we know our parents' parents, . . . and very often nothing else.
I think I saw once a very old photo my mother and her sisters kept of their parents --that is, my maternal great-grandparents, but that is all. From my parental side, I was a teenager when my grandfather died, his wife, my grandmother surviving till 92 years, so I was an adult young woman.
As you say in your wonderful story, sometimes we know something about our great-grandparents, but usually very little.
Here, in America, a biologist said once that many white people would be surprised, if a DNA test were done, how many of them have black and indian heritage.
I don't know why but I agree with this. Our DNA is unique because it is only our way of evolution and has nothing to do with our present family and country.
I really enjoyed this story. I wish you a lot of success in Medium. I publish very often, but I still earn peanuts. Anyway, I don't mind, because publishing in Medium goes to my Resumé --you know, we must have a Portfolio.
Maria, ALL the BEST for you and your family. Louisa.