I have posted what I know starting with David Adams b. 1765. The DeHaven family is also German (Dutch Reformed) and intermarried with the Adams family in that area. Many of the older ones are buried in the Quaker Cemetery, Gainsboro, Virginia.
You can either go to www.rootsweb.com or contact me at firstname.lastname@example.org and have a copy of my gedcom.
This is of interest to me because it was siad @ 1900 that the Adams children and the DeHaven chiildren all looked alike.