| Birth | 1709 | Though widely recognized as daughter of Anna Reiff and Gerhart Clemens, there is no definite proof as to Mary's surname. The Bergey family history lists her as daughter of Gerhard Clemens, but there seems to be no indication of this in the Clemens history. - Skippack, Montgomery, Pennsylvania, USA | | | |
| Marriage | 1724 | Lower Salford Twp, Philadelphia Co (now Montgomery Co), Pennsylvania, USA - Hans John Ulrich Bergey | | | |
| Death | May, 1789 | Mary is not listed on the Clemens Memorial stone at the Salford Cemetery, nor is any daughter of Gerhard Clemens & Anna Reiff listed on the emigration lists of 1709. - Lower Salford, Montgomery, Pennsylvania, USA | | | |
| Marriage | | of PA - Hans John Ulrich Bergey | | | |
| Children | | Hans John Ulrich Bergey |  | | |
| Residence | | USA | |  | |