Unknown Duncan
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 | Rodney Duncan Abt 1898-Yes, date unknown |
| Rodney Duncan | |
| B: | Abt 1898 |
| , , Pennsylvania, United States | |
| D: | Yes, date unknown |
 | Katherine I. Abt 1872-Yes, date unknown |
| Katherine I. | |
| B: | Abt 1872 |
| , , Pennsylvania, United States | |
| M: | Yes, date unknown |
| D: | Yes, date unknown |