Colleen,
That is a great stretch you've posted concerning the John Cobb I've researched. There were four (4) Cobb families in the earliest American immigration. There were Cape Cod (Barnstable), Boston, Taunton, and Virginia families (see Philip Cobb's book "History of the Cobb Family"). While Cobbs of the Northeast emigrated westward, I can not tell which family yours came from other than probably the Virginia family. John Cobb's descendants settled in MA, CT, NH, and VT. There is a manuscript on a desc. of John Cobb (a David Ransom Cobb) going to Bourbon Co., Kansas. Can you relate to him ?
You might try another message board:
www.Genforum.com/cobb for more insight.