| 1. Peter McMahon |
 |
| B: |
1858 |
| P: |
, , Wisconsin, United States |
| D: |
Yes, date unknown |
| P: |
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| 2. James P. McMahon |
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| B: |
28 Dec 1823 |
| P: |
, , , Ireland |
| M: |
19 Oct 1853 |
| P: |
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| D: |
19 Mar 1882 |
| P: |
Doylestown, Columbia, Wisconsin, United States |
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| 4. Edward Matthew McMahon |
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| B: |
18 May 1786 |
| P: |
, , , Ireland |
| M: |
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| P: |
|
| D: |
18 Jun 1869 |
| P: |
Doylestown, Columbia, Wisconsin, United States |
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| 8. |
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1858 - Yes, date unknown