Mandy, This is mind boggling stuff and if true would merge group 20 with many other groups that DNA is showing appear to share an Ephraim ancestor (d. 1750 Rowan Co, NC). These families would by implication be descendants of Ephraim of CT but the proof for this jump I thought was missing. But how do you know that your Nathaniel was not the one that previous work suggests was born in England? I suppose there are no group 20 men who still have the Pennington surname or else DNA could help here? Do we know if there are any Pen(n)ingtons still living in NJ who descend from one of these early Morris Co, NJ Pen(n)ingtons. I thought from what is on the web at Gencircles (and some files here list descendants of these Morris county Penningtons) that these families daughtered out! Nick.