Willi Leo Sieling
- Occupation - medikus
| PARENT (M) Jacob Arie Sieling | |||
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| Marriage | to Thea Ingrid Dora Schulze | ||
| Father | ? | ||
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| PARENT (F) Thea Ingrid Dora Schulze | |||
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| Marriage | to Jacob Arie Sieling | ||
| Father | Friedrich Wilhelm Ludwig Schulze | ||
| Mother | Cornelia Johanna Hollebrands | ||
| CHILDREN | |||
| M | Willi Leo Sieling | ||
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| F | René Reine Sieling | ||
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| M | Johann Matthieu Sieling | ||
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