Turner Family Genealogy Forum
I don't know. The John Turner who was a passenger on the Mayflower and his two sons all died the first winter at Plymouth Colony.
However, he left behind in England a grown son, Humphrey Turner, who came to Plymouth Colony a few years later with his wife, Lydia Gamer. They had eight children, including the "Young John" and elder John referred to by Jim LaLone. The "Young John" was born in Plymouth while the elder John was born in England. So, it could be one of these Johns (grandchildren of the Mayflower John Turner) who is the grandfather of Susannah. This is all well documented.