| Name | Role | Place | Source | |
|---|---|---|---|---|
| A Kolthof | Registered | Gieten | Population register | |
| A. Eijses Kolthof | Mention | Correspondence | ||
| A. Eisens -Kolthof | Mention | Correspondence | ||
| A. Eisens -Kolthof | Mention | Correspondence | ||
| A. Kolthof | Registered | 1879 | Amsterdam | Family cards |
| A. Kolthof | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| A. Kolthof | Registered | 1879 | Amsterdam | Passport applications |
| A. Kolthof | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| A. Kolthof | Mention | Correspondence | ||
| A. Kolthof | Registered | 's-Gravenhage, Amsterdam | Management file |
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