| Name | Role | Place | Source | |
|---|---|---|---|---|
| Frederik Adrianus van der Kwaak | Deceased | 1945 | Leiden | Civil registration deaths |
| Frederik Adrianus van der Kwaak | Deceased | 1945 | Leiden | Civil registration deaths |
| Frederik van der Kwaak | Father | 1761 | Rijnsburg | Church records baptisms |
| Frederik van der Kwaak | Father | 1755 | Rijnsburg | Church records baptisms |