Hans Groff (ca.1665-1726), probably a German or Swiss immigrant, lived in Lancaster County, Pennsylvania, and married widow Anna Lichti Mier. Anna had been married to a Lichti first, then a Mier, then Hans Groff, and after his death, married Peter Leman. Descendants and relatives of Hans Groff lived in Pennsylvania, Maryland, Virginia, New York and elsewhere. Some descendants immigrated to Ontario and elsewhere in Canada. Includes Barr (Bar, Bare, Bear), Dohner, Eshleman, Herr, Kendig, Rohrer and related family.

The circular letter solicits subscriptions for a newspaper to be published monthly with information on a supposed Dutch estate held in reversion for members of the Graf, Groff, and Grove families in the United States.