There is misinformation on forum 811 that shows the following ancestry: Thomas Jefferson3, John Madison2, John1
The person shown above as John1 has not been proven and no factual data has been located.However, at an earlier time it was thought that a John Dean was the father of John M. Dean, but that has since been proven false and that John Dean1 belonged to another Dean family line of which there is an incredible amount of documents pertaining to him and his ancestry and descendants.Too, the Y-DNA tests of today have been incredibly helpful is sorting out which family belongs to which ancestors.
Also, the name John Madison Dean was created from the only record that has ever been found to even show an initial for him, an "M."Thus, the name "Madison" must not be copied as fact since no researcher of today, or yesterday, has been able to put forth any record to support the name ÒMadison.Ó Too, there are several family names that begin with an "M." of which one of those names may be the same as the unknown middle name of John.
In the early 1950s a particular person decided the middle name of Thomas Dean was Jefferson since he had named one of his sons Thomas Jefferson Dean.However, Thomas Dean the father never used a middle name or initial and most of us have learned that one cannot assume that both the father and son shared identical names because in a number of instances they did not share identical names other than the first and last name.None of the records of the father Thomas Dean show a middle initial, as well as his headstone.
The 1950's a particular person gave a middle name to the father Thomas and that person also took liberties with the names and records of other early kin, even assigning non-existent CW records and war escapades to a few family members.