Hi Chris,
The David B. Ewan (b. 1829) in my post is actually a different person than the David Ewan (b. 1844) of Burlington County. Though I am related to both through my grandmother. I am the 3-great grandnephew of David and Abigail (Shinn) Ewan of Burlington Cty. and the 3rd great grandson of David B. Ewan of Camden Cty. I have wondered whether the two families do connect at some point further back. I see you go back a bit further in your info on the Burlington Ewan's (I only have up to Job and Mary Parker Ewan).
The Camden Cty. David Ewan's parents were David A. Ewan (b. 1791) and Rachel Bozarth (b. 1797). I just recently made this connection and so have not done much research to go back further.
Steve