It is easy to make claims, as the author of the FTDNA Hamilton project. But without family trees, and actual DNA connection shown, the claims are unconvincing. This has already been explained in the references mentioned in my comment above.
James A. Folger, founder of the Folgers Coffee Company in the USA, belonged to haplogroup I1. According to the Folger DNA Project webpage at FTDNA, a plurality of members are I1, including a descendant of Peter Folger (1617-1690), who was a male-line ancestor of James Folger.
John Harvey Kellogg (1852-1943), the inventor of the corn flakes and founder of the Kellog's breakfast cereal brand, was a descendant of Nicholas Kellogg, Baron Audley (1458-1493) from Debden, Essex, England, as well as Nicholas Kellogg (1488-1563) and Martin Kellogg (1595-1671). As such he belongs to Family A in the Kellog Y-DNA project, who are I1-Z58 > Z138 > S2293 > S6277 > Y15902 > Y15575 > Y16450 > Y16458 > Y16452 > A14623.
This thread has been viewed 36024 times.