| 1829 | Joseph Jankowski married Constantia Roszynska in Zytowiecko (Seide), Poland. |
| unknown | Joseph and Constantia moved to Czarkowo. |
| April 2, 1830 | Franciscus Jankowski born to Joseph and Constantia in Czarkowo. |
| April 4, 1831 | Constantin Jankowski born to Joseph and Constantia in Czarkowo. |
| October 17, 1852 | Constantin Jankowski married Barbara Frackowiak in Czarkowo. |
| October 24, 1852 | Franciscus Jankowski married Marianna Szule in Drzewce, Poland. |
