The Good Genealogy:
Genetic Analysis of the Thomas Shannon lineage YDNA
Genetic Analysis of Shannon lineage atDNA
Ancient Origins Best Guess: Shennan family of Kirkcudbrightshire
Pre-Migration Origins Best Guess : London
The Actual Known Documentation on Thomas Shannon
The Bad Genealogy:
Thomas/Eigness Shannon of Sadsbury Township, Pennsylvania, Nathaniel Shannon of Boston.
William Shannon (b. 1812) was not the son of John (1759-1815)
John Shannon of Abbeville, South Carolina (d. 1814)
Moses Shannon was not the father of John C. Shannon (1816-1896)
Rebecca Crow was not the mother of William Shannon (1844-1917)
Bad Genealogy Rant: Thomas Shannon (1730-1794) and descendants. 