| 1. Frank Gordon Derr |
 |
| B: |
2 Mar 1890 |
| P: |
Baltimore, Baltimore County, Maryland |
| D: |
13 May 1950 |
| P: |
Springfield, Delaware County, Pennsylvania |
|
| 2. Samuel Wentz Derr |
|
| B: |
10 Nov 1855 |
| P: |
Frederick County, Maryland |
| M: |
1888 |
| P: |
|
| D: |
31 May 1930 |
| P: |
Philadelphia, Philadelphia County, Pennsylvania |
|
| 4. William Henry Derr |
|
| B: |
25 Mar 1824 |
| P: |
Lewistown, Frederick County, Maryland |
| M: |
28 Jan 1847 |
| P: |
Frederick County, Maryland |
| D: |
2 Dec 1897 |
| P: |
Baltimore, Baltimore County, Maryland |
|
| 8. John W. Derr |
|
| B: |
1 Oct 1789 |
| P: |
York County, Pennsylvania |
| M: |
|
| P: |
|
| D: |
16 Oct 1872 |
| P: |
Frederick County, Maryland |
|
1890 - 1950 (60 years)