| 1. William Francis deDufour |
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| B: |
11 Nov 1925 |
| P: |
Bronx, Bronx County, New York, USA |
| D: |
30 Jan 1979 |
| P: |
Rockville, Montgomery County, Maryland, USA |
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| 2. William Frederick deDufour |
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| B: |
3 Aug 1895 |
| P: |
New York, New York County, New York, USA |
| M: |
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| D: |
21 May 1953 |
| P: |
Bronx, Bronx County, New York, USA |
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| 11. |
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| 3. Laura Elizabeth Burger |
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| B: |
30 Nov 1904 |
| P: |
Bronx, New York County, New York, USA |
| D: |
11 Nov 1983 |
| P: |
Towson, Baltimore County, Maryland, USA |
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| 12. Heinrich M. Burger |
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| B: |
0Apr 1841 |
| P: |
Hannover, Niedersachsen |
| M: |
1863 |
| P: |
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| D: |
28 Mar 1919 |
| P: |
Manhattan, New York City, New York, USA |
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| 13. Elizabeth Swick |
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| B: |
11 Aug 1844 |
| P: |
Manhattan, New York City, New York, USA |
| D: |
1 May 1915 |
| P: |
Bronx, Bronx County, New York, USA |
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| 7. Anna Merget |
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| B: |
25 Apr 1876 |
| P: |
Manhattan, New York City, New York, USA |
| D: |
1 Apr 1959 |
| P: |
Bronx, Bronx County, New York, USA |
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1925 - 1979 (53 years)