I have Sago's in my family tree. My grandmother was a Sago. Her name was Mabel Sago. She married James Sanders. She was born April 17, 1931 in Stephensport, Kentucky and died January 6, 1993 in Mattoon, Illinois. I have quite a bit of info on the Sago's (not a lot, but a pretty good amount) from the Kentucky area. I have gotten behind a brick wall on them, lol. Yes, I know that the Sago name is VERY uncommon and it is very difficult to find information on them. My great-grandfather was Michael "Mike" Sago. He was born December 6, 1870 and died January 29, 1951. He married Myrtle Horsley, daughter of Albin Horsley and Harriet Haycraft. Michael was the son of Abraham Sago and Johanna Roach. Abraham was the son of Michael and Ann Sago.
I would be glad to exchange info with you. Feel free to email me at firstname.lastname@example.org