| Father | Male Peter Williamsen |
| Born | cir 1745 | Gelderland, Netherlands |
| Died | 14 Apr 1837 | Elst, Gelderland, Netherlands |
| Buried | ||
| Married | 03 Jul 1786 | Elst, Gelderland, Netherlands |
| Other Spouse | Gerritje Jansen | F163033 | |
| Married | 28 Jun 1776 | Elst, Gelderland, Netherlands |
| Father | ||
| Mother | ||
| Child 1 | Female Anna Maria Willemsen |
| Born | cir 1790 | Elst, Gelderland, Netherlands |
| Died | ||
| Buried | ||
| Spouse | Hermanus Hermsen | F129222 | |
| Married | 12 Jan 1822 | Elst, Gelderland, Netherlands |
| Child 2 | Female Elisabeth Willemsen |
| Born | cir 1794 | Elst, Gelderland, Netherlands |
| Died | ||
| Buried | ||
| Spouse | Oswaldus Scheers | F163053 | |
| Married | 24 Nov 1812 | Netterden, Oude IJsselstreek, Gelderland, Netherlands |
| Child 3 | Male Johannes Willemsen |
| Born | cir 1797 | Elst, Gelderland, Netherlands |
| Died | 25 Aug 1871 | Arnhem, Gelderland, Netherlands |
| Buried |
| Child 4 | Male William Williamson |
| Born | 30 Jun 1800 | Netherlands |
| Died | 05 Oct 1886 | Freedom, Outagamie Co, Wisconsin |
| Buried | ||
| Spouse | Hendrina Jansen | F45910 | |
| Married | 13 Feb 1823 | Elst, Gelderland, Netherlands |