| Name | Role | Place | Source | |
|---|---|---|---|---|
| Josephus Ignatius Maria Welzing | Child | 1913 | Arnhem | Civil registration births |
| Maria Anna Welzing | Child | 1915 | Arnhem | Civil registration births |
| Maria Welzing | Registered | 1922 | Population register | |
| Maria Welzing | Registered | Ede | Reconstructed personal record cards | |
| Maria Welzing | Registered | 1734 | Amsterdam | Notarial records |
| Sophia Maria Johanna Welzing | Registered | Ede | Reconstructed personal record cards | |
| Sophia Maria Johanna Welzing | Bride | 1927 | Wageningen, Elten | Civil registration marriages |
| Wilhelmus Johannes Cornelius Maria Welzing | Child | 1909 | Arnhem | Civil registration births |
| Wilhelmus Johannes Cornelius Maria Welzing | Registered | 's-Gravenhage, Arnhem | Individual Files |
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