| Name | Role | Place | Source | |
|---|---|---|---|---|
| E Clausing | Registered | 1788 | Amsterdam | Notarial records |
| E Clausing | Registered | 1822 | Breda | Population register |
| E. Clausing-Amstein | Registered | 's-Gravenhage, Rabenau | Management file | |
| Johan E. Clausing | Registered | 1910 | Nijmegen | Population register |
| Johan E. Clausing | Registered | 1900 | Nijmegen | Population register |
| Maria E Clausing | Registered | 1850 | Maarssen | Population register |
| Maria E Clausing | Registered | 1860 | Maarsseveen, Heemstede | Population register |
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