JOHN FULLER OF NEWTON – DNA – ORIGINS
All direct male descendants of John Fuller of Newton known to us and who have had a DNA test, have the same Y-DNA Haplogroup of I-M253.
Wikipedia for Haplogroup I-M253 on 29 April, 2021 reported the following:
“In terms of national averages, I-M253 is found in 38–39% of Swedish males, 37% of Norwegian males, 34.8% of Danish males, 34.5% of Icelandic males, and about 28% of Finnish males. Today it reaches its peak in Sweden (52 percent of males in Västra Götaland county) and western Finland (more than 50 percent in the Satakunta province).”
The other common DNA Group found in East Anglia, Suffolk, England is Haplogroup R-M269. “R-M269 is of particular interest for the genetic history of Western Europe, being the most common European haplogroup.” 
We also know that the Mayflower Fullers were Haplogroup R-M269 (refined to R-Y85916).
Our conclusion is that John Fuller was not part of the Mayflower Fuller family and that his Paternal line Descended from Scandinavia (the Vikings).
This also means that all descendants of John Fuller of Newton also descend from the Vikings.