| Name | Role | Place | Source | |
|---|---|---|---|---|
| Irma Erica Neff | Registered | 1880 | Population register | |
| Irma Erika Neff | Registered | 1880 | Population register | |
| Irma Erika Neff | Bride | 1932 | Rotterdam | Civil registration marriages |
| Irma Erika Neff | Bride | 1932 | Rotterdam | Civil registration marriages |
| Irma Louise Neff | Deceased | 1976 | Limeil-Brévannes | Civil registration deaths |
| Irma Louise Neff | Deceased | 1976 | Limeil-Brévannes | Civil registration deaths |
| Irma Neff | Travelers | 1907 | Rotterdam | Passenger registers |
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