| Father | Leendert Philips van Onselen (1704 - ) |
| Mother | Trijntje van de Weg (1707 - ) |
| Sibling | Ccornelis van Onselen (1727 - ) |
| Sibling | Teuntie van Onselen (1744 - ) |
| Sibling | Annetje van Onselen ( - ) |
| Sibling | Leendert van Onselen (1740 - ) |
| Sibling | Pleuntje van Onselen (1747 - ) |
| Sibling | Leendert van Onselen (1736 - ) |
| Sibling | Leendert van Onselen ( - ) |
| Sibling | Cornelis van Onselen (1733 - ) |
| Sibling | Pieter van Onselen ( - ) |
| Sibling | Philips van Onselen (1732 - ) |
| Sibling | Pieter van Onselen (1748 - ) |
| Sibling | Philippus van Onselen ( - ) |
| Sibling | Philip van Onselen (1732 - ) |