Family History Research in Poland
 | Jan Kościuszko -1646 |
| Jan Kościuszko | |
| D: | 1646 |
| Hrehory Kościuszko -1619 |
| Hrehory Kościuszko | |
| D: | 1619 |
| Konstanty Kościuszko -1561 |
| Konstanty Kościuszko | |
| D: | 1561 |
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