
| Name | Willem I VAN OBERSTEIN | |
| Birth | Abt 1140 | Netherlands |
| Gender | Male | |
| Death | Yes, date unknown | |
| Person ID | I25308 | Coombs |
| Last Modified | 1 Dec 2014 | |
| Father | Eberhard II VAN OBERSTEIN, b. Abt 1110, Netherlands d. Aft 1158 (Age > 49 years) | |
| Family ID | F8857 | Group Sheet | Family Chart |
| Family | Mathilde VAN SANPIGNY, b. Abt 1142, Netherlands d. Yes, date unknown | |||
| Children |
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| Family ID | F8855 | Group Sheet | Family Chart | ||
| Last Modified | 2 Feb 2026 | |||
| Notes |