Jason, this is not my direct line, but a cousin who has done extensive research on the Augusta County, VA, Denniston family believes that your Washington H. Denison was a son of John Dennison Jr., b. in VA, d. ca Mar 1834 in Augusta Co.; and Hannah Henderson (d/o Jones Henderson). Further, Washington's wife was Rebecca Ann Geeting (d/o Henry Geeting.) Washington and Rebecca were reportedly living in Bath Co., VA, in 1834. Contact me at camanoalan@yahoo.com if you would like to pursue this. Alan