See "From Germany to Antietam, the early history of the Pfaffenberger family", By Thomas Poffenberger. Xlibris, 2000. Book from Amazon.com 275 pages. $16.
The book traces the founding family in Germany, their arrival in Philadelphia in 1733, their settlement in Berks Co., Pennsylvania, migration to Dauphin Co., Pa, Maryland and Virginia. All various spellings of the name have been traced to this couple. The author is professor emeritus, U. of Michigan and since retirement has spent a number of years tracing the family.